From c1209a8048560c35aaa3bea75e68a910287f7c08 Mon Sep 17 00:00:00 2001
From: sebseb7 <sebgreenbus@gmail.com>
Date: Mon, 24 Nov 2025 11:04:45 +0100
Subject: [PATCH] feat: Implement client-side version mismatch detection with
 reload prompt and add Nodemon for development.

---
 index.html                      |  61 +++++-
 nodemon.json                    |  11 ++
 package-lock.json               | 338 ++++++++++++++++++++++++++++++++
 package.json                    |   9 +-
 src/index.js                    |   2 +-
 src/server/routes/index.js      |   8 +-
 src/server/server.js            |   2 +-
 src/server/socket/connection.js |  10 +-
 src/utils/database.js           |   2 +-
 9 files changed, 434 insertions(+), 9 deletions(-)
 create mode 100644 nodemon.json

diff --git a/index.html b/index.html
index 22328ef..7ad12b7 100644
--- a/index.html
+++ b/index.html
@@ -60,7 +60,6 @@
         }
 
         .category:hover {
-            transform: translateX(4px);
             box-shadow: 0 4px 12px rgba(102, 126, 234, 0.2);
         }
 
@@ -178,6 +177,46 @@
             box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
             outline: none;
         }
+
+        #version-reload-btn {
+            position: fixed;
+            bottom: 20px;
+            right: 20px;
+            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+            color: white;
+            border: none;
+            padding: 12px 20px;
+            border-radius: 8px;
+            font-size: 0.9rem;
+            font-weight: 600;
+            cursor: pointer;
+            box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
+            transition: all 0.3s ease;
+            display: none;
+            z-index: 1000;
+        }
+
+        #version-reload-btn:hover {
+            transform: translateY(-2px);
+            box-shadow: 0 6px 16px rgba(102, 126, 234, 0.5);
+        }
+
+        #version-reload-btn.show {
+            display: block;
+            animation: slideIn 0.3s ease;
+        }
+
+        @keyframes slideIn {
+            from {
+                transform: translateY(100px);
+                opacity: 0;
+            }
+
+            to {
+                transform: translateY(0);
+                opacity: 1;
+            }
+        }
     </style>
 </head>
 
@@ -188,6 +227,7 @@
             <div class="loading">Loading categories...</div>
         </div>
     </div>
+    <button id="version-reload-btn" onclick="location.reload()">New version - [reload]</button>
 
     <script src="/socket.io/socket.io.js"></script>
     <script>
@@ -206,9 +246,24 @@
         const container = document.getElementById('tree-container');
         const filterInput = document.getElementById('filter-input');
 
+        // Version checking
+        const clientEtag = document.querySelector('meta[name="app-version"]')?.content;
+        const reloadBtn = document.getElementById('version-reload-btn');
+
         // Socket Events
         socket.on('connect', () => {
             console.log('🔌 Connected to server via WebSocket');
+            // Check version on connect and reconnect
+            if (clientEtag) {
+                socket.emit('checkVersion', clientEtag);
+            }
+        });
+
+        socket.on('versionMismatch', ({ serverEtag }) => {
+            console.log('⚠️  New version available on server');
+            if (reloadBtn) {
+                reloadBtn.classList.add('show');
+            }
         });
 
         socket.on('categoriesUpdated', () => {
@@ -242,8 +297,10 @@
             if (value.trim()) {
                 debouncedSearch(value);
             } else {
-                // Clear matches
+                // Clear matches and collapse all categories
                 resetMatches(state.categories);
+                resetExpansion(state.categories);
+                collapseAllProducts(state.categories);
                 render();
             }
         });
diff --git a/nodemon.json b/nodemon.json
new file mode 100644
index 0000000..4052ed0
--- /dev/null
+++ b/nodemon.json
@@ -0,0 +1,11 @@
+{
+    "watch": [
+        "src",
+        "index.html"
+    ],
+    "ext": "js,json,html",
+    "ignore": [
+        "node_modules",
+        "cache"
+    ]
+}
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index 5bbaa6b..108ff4a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,6 +14,9 @@
         "openai": "^6.9.1",
         "sharp": "^0.34.5",
         "socket.io": "^4.8.1"
+      },
+      "devDependencies": {
+        "nodemon": "^3.1.11"
       }
     },
     "node_modules/@azure-rest/core-client": {
@@ -842,6 +845,27 @@
         "node": ">= 14"
       }
     },
+    "node_modules/anymatch": {
+      "version": "3.1.3",
+      "resolved": "https://registry.npmjs.org/anymatch/-/anymatch-3.1.3.tgz",
+      "integrity": "sha512-KMReFUr0B4t+D+OBkjR3KYqvocp2XaSzO55UcB6mgQMd3KbcE+mWTyvVV7D/zsdEbNnV6acZUutkiHQXvTr1Rw==",
+      "dev": true,
+      "license": "ISC",
+      "dependencies": {
+        "normalize-path": "^3.0.0",
+        "picomatch": "^2.0.4"
+      },
+      "engines": {
+        "node": ">= 8"
+      }
+    },
+    "node_modules/balanced-match": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
+      "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/base64-js": {
       "version": "1.5.1",
       "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.5.1.tgz",
@@ -871,6 +895,19 @@
         "node": "^4.5.0 || >= 5.9"
       }
     },
+    "node_modules/binary-extensions": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/binary-extensions/-/binary-extensions-2.3.0.tgz",
+      "integrity": "sha512-Ceh+7ox5qe7LJuLHoY0feh3pHuUDHAcRUeyL2VYghZwfpkNIy/+8Ocg0a3UuSoYzavmylwuLWQOf3hl0jjMMIw==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=8"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/bl": {
       "version": "6.1.4",
       "resolved": "https://registry.npmjs.org/bl/-/bl-6.1.4.tgz",
@@ -915,6 +952,30 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/brace-expansion": {
+      "version": "1.1.12",
+      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.12.tgz",
+      "integrity": "sha512-9T9UjW3r0UW5c1Q7GTwllptXwhvYmEzFhzMfZ9H7FQWt+uZePjZPjBP/W1ZEyZ1twGWom5/56TF4lPcqjnDHcg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "balanced-match": "^1.0.0",
+        "concat-map": "0.0.1"
+      }
+    },
+    "node_modules/braces": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/braces/-/braces-3.0.3.tgz",
+      "integrity": "sha512-yQbXgO/OSZVD2IsiLlro+7Hf6Q18EJrKSEsdoMzKePKXct3gvD8oLcOQdIzGupr5Fj+EDe8gO/lxc1BzfMpxvA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "fill-range": "^7.1.1"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/buffer": {
       "version": "6.0.3",
       "resolved": "https://registry.npmjs.org/buffer/-/buffer-6.0.3.tgz",
@@ -998,6 +1059,31 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/chokidar": {
+      "version": "3.6.0",
+      "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-3.6.0.tgz",
+      "integrity": "sha512-7VT13fmjotKpGipCW9JEQAusEPE+Ei8nl6/g4FBAmIm0GOOLMua9NDDo/DWp0ZAxCr3cPq5ZpBqmPAQgDda2Pw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "anymatch": "~3.1.2",
+        "braces": "~3.0.2",
+        "glob-parent": "~5.1.2",
+        "is-binary-path": "~2.1.0",
+        "is-glob": "~4.0.1",
+        "normalize-path": "~3.0.0",
+        "readdirp": "~3.6.0"
+      },
+      "engines": {
+        "node": ">= 8.10.0"
+      },
+      "funding": {
+        "url": "https://paulmillr.com/funding/"
+      },
+      "optionalDependencies": {
+        "fsevents": "~2.3.2"
+      }
+    },
     "node_modules/commander": {
       "version": "11.1.0",
       "resolved": "https://registry.npmjs.org/commander/-/commander-11.1.0.tgz",
@@ -1007,6 +1093,13 @@
         "node": ">=16"
       }
     },
+    "node_modules/concat-map": {
+      "version": "0.0.1",
+      "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
+      "integrity": "sha512-/Srv4dswyQNBfohGpz9o6Yb3Gz3SrUDqBH5rTuhGR7ahtlbYKnVxw2bCFMRljaA7EXHaXZ8wsHdodFvbkhKmqg==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/content-disposition": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-1.0.1.tgz",
@@ -1400,6 +1493,19 @@
         "url": "https://opencollective.com/express"
       }
     },
+    "node_modules/fill-range": {
+      "version": "7.1.1",
+      "resolved": "https://registry.npmjs.org/fill-range/-/fill-range-7.1.1.tgz",
+      "integrity": "sha512-YsGpe3WHLK8ZYi4tWDg2Jy3ebRz2rXowDxnld4bkQB00cc/1Zw9AWnC0i9ztDJitivtQvaI9KaLyKrc+hBW0yg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "to-regex-range": "^5.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/finalhandler": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-2.1.0.tgz",
@@ -1435,6 +1541,21 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/fsevents": {
+      "version": "2.3.3",
+      "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.3.3.tgz",
+      "integrity": "sha512-5xoDfX+fL7faATnagmWPpbFtwh/R77WmMMqqHGS65C3vvB0YHrgF+B1YmZ3441tMj5n63k0212XNoJwzlhffQw==",
+      "dev": true,
+      "hasInstallScript": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
+        "node": "^8.16.0 || ^10.6.0 || >=11.0.0"
+      }
+    },
     "node_modules/function-bind": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.2.tgz",
@@ -1481,6 +1602,19 @@
         "node": ">= 0.4"
       }
     },
+    "node_modules/glob-parent": {
+      "version": "5.1.2",
+      "resolved": "https://registry.npmjs.org/glob-parent/-/glob-parent-5.1.2.tgz",
+      "integrity": "sha512-AOIgSQCepiJYwP3ARnGx+5VnTu2HBYdzbGP45eLw1vr3zB3vZLeyed1sC9hnbcOc9/SrMyM5RPQrkGz4aS9Zow==",
+      "dev": true,
+      "license": "ISC",
+      "dependencies": {
+        "is-glob": "^4.0.1"
+      },
+      "engines": {
+        "node": ">= 6"
+      }
+    },
     "node_modules/gopd": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/gopd/-/gopd-1.2.0.tgz",
@@ -1493,6 +1627,16 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/has-flag": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
+      "integrity": "sha512-sKJf1+ceQBr4SMkvQnBDNDtf4TXpVhVGateu0t918bl30FnbE2m4vNLX+VWe/dpjlb+HugGYzW7uQXH98HPEYw==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=4"
+      }
+    },
     "node_modules/has-symbols": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/has-symbols/-/has-symbols-1.1.0.tgz",
@@ -1599,6 +1743,13 @@
       ],
       "license": "BSD-3-Clause"
     },
+    "node_modules/ignore-by-default": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/ignore-by-default/-/ignore-by-default-1.0.1.tgz",
+      "integrity": "sha512-Ius2VYcGNk7T90CppJqcIkS5ooHUZyIQK+ClZfMfMNFEF9VSE73Fq+906u/CWu92x4gzZMWOwfFYckPObzdEbA==",
+      "dev": true,
+      "license": "ISC"
+    },
     "node_modules/inherits": {
       "version": "2.0.4",
       "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
@@ -1614,6 +1765,19 @@
         "node": ">= 0.10"
       }
     },
+    "node_modules/is-binary-path": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/is-binary-path/-/is-binary-path-2.1.0.tgz",
+      "integrity": "sha512-ZMERYes6pDydyuGidse7OsHxtbI7WVeUEozgR/g7rd0xUimYNlvZRE/K2MgZTjWy725IfelLeVcEM97mmtRGXw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "binary-extensions": "^2.0.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/is-docker": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/is-docker/-/is-docker-3.0.0.tgz",
@@ -1629,6 +1793,29 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/is-extglob": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/is-extglob/-/is-extglob-2.1.1.tgz",
+      "integrity": "sha512-SbKbANkN603Vi4jEZv49LeVJMn4yGwsbzZworEoyEiutsN3nJYdbO36zfhGJ6QEDpOZIFkDtnq5JRxmvl3jsoQ==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
+    "node_modules/is-glob": {
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/is-glob/-/is-glob-4.0.3.tgz",
+      "integrity": "sha512-xelSayHH36ZgE7ZWhli7pW34hNbNl8Ojv5KVmkJD4hBdD3th8Tfk9vYasLM+mXWOZhFkgZfxhLSnrwRr4elSSg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "is-extglob": "^2.1.1"
+      },
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/is-inside-container": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/is-inside-container/-/is-inside-container-1.0.0.tgz",
@@ -1647,6 +1834,16 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/is-number": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/is-number/-/is-number-7.0.0.tgz",
+      "integrity": "sha512-41Cifkg6e8TylSpdtTpeLVMqvSBEVzTttHvERD741+pnZ8ANv0004MRL43QKPDlK9cGvNp6NZWZUBlbGXYxxng==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.12.0"
+      }
+    },
     "node_modules/is-promise": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/is-promise/-/is-promise-4.0.0.tgz",
@@ -1814,6 +2011,19 @@
         "url": "https://opencollective.com/express"
       }
     },
+    "node_modules/minimatch": {
+      "version": "3.1.2",
+      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.1.2.tgz",
+      "integrity": "sha512-J7p63hRiAjw1NDEww1W7i37+ByIrOWO5XQQAzZ3VOcL0PNybwpfmV/N05zFAzwQ9USyEcX6t3UO+K5aqBQOIHw==",
+      "dev": true,
+      "license": "ISC",
+      "dependencies": {
+        "brace-expansion": "^1.1.7"
+      },
+      "engines": {
+        "node": "*"
+      }
+    },
     "node_modules/ms": {
       "version": "2.1.3",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
@@ -1854,6 +2064,45 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/nodemon": {
+      "version": "3.1.11",
+      "resolved": "https://registry.npmjs.org/nodemon/-/nodemon-3.1.11.tgz",
+      "integrity": "sha512-is96t8F/1//UHAjNPHpbsNY46ELPpftGUoSVNXwUfMk/qdjSylYrWSu1XavVTBOn526kFiOR733ATgNBCQyH0g==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "chokidar": "^3.5.2",
+        "debug": "^4",
+        "ignore-by-default": "^1.0.1",
+        "minimatch": "^3.1.2",
+        "pstree.remy": "^1.1.8",
+        "semver": "^7.5.3",
+        "simple-update-notifier": "^2.0.0",
+        "supports-color": "^5.5.0",
+        "touch": "^3.1.0",
+        "undefsafe": "^2.0.5"
+      },
+      "bin": {
+        "nodemon": "bin/nodemon.js"
+      },
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/nodemon"
+      }
+    },
+    "node_modules/normalize-path": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/normalize-path/-/normalize-path-3.0.0.tgz",
+      "integrity": "sha512-6eZs5Ls3WtCisHWp9S2GUy8dqkpGi4BVSz3GaqiE6ezub0512ESztXUwUB6C6IKbQkY2Pnb/mD4WYojCRwcwLA==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/object-assign": {
       "version": "4.1.1",
       "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.1.tgz",
@@ -1954,6 +2203,19 @@
         "url": "https://opencollective.com/express"
       }
     },
+    "node_modules/picomatch": {
+      "version": "2.3.1",
+      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-2.3.1.tgz",
+      "integrity": "sha512-JU3teHTNjmE2VCGFzuY8EXzCDVwEqB2a8fsIvwaStHhAWJEeVd1o1QD80CU6+ZdEXXSLbSsuLwJjkCBWqRQUVA==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=8.6"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/jonschlinkert"
+      }
+    },
     "node_modules/process": {
       "version": "0.11.10",
       "resolved": "https://registry.npmjs.org/process/-/process-0.11.10.tgz",
@@ -1976,6 +2238,13 @@
         "node": ">= 0.10"
       }
     },
+    "node_modules/pstree.remy": {
+      "version": "1.1.8",
+      "resolved": "https://registry.npmjs.org/pstree.remy/-/pstree.remy-1.1.8.tgz",
+      "integrity": "sha512-77DZwxQmxKnu3aR542U+X8FypNzbfJ+C5XQDk3uWjWxn6151aIMGthWYRXTqT1E5oJvg+ljaa2OJi+VfvCOQ8w==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/qs": {
       "version": "6.14.0",
       "resolved": "https://registry.npmjs.org/qs/-/qs-6.14.0.tgz",
@@ -2031,6 +2300,19 @@
         "node": "^12.22.0 || ^14.17.0 || >=16.0.0"
       }
     },
+    "node_modules/readdirp": {
+      "version": "3.6.0",
+      "resolved": "https://registry.npmjs.org/readdirp/-/readdirp-3.6.0.tgz",
+      "integrity": "sha512-hOS089on8RduqdbhvQ5Z37A0ESjsqz6qnRcffsMU3495FuTdqSm+7bhJ29JvIOsBDEEnan5DPu9t3To9VRlMzA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "picomatch": "^2.2.1"
+      },
+      "engines": {
+        "node": ">=8.10.0"
+      }
+    },
     "node_modules/router": {
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/router/-/router-2.2.0.tgz",
@@ -2256,6 +2538,19 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/simple-update-notifier": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/simple-update-notifier/-/simple-update-notifier-2.0.0.tgz",
+      "integrity": "sha512-a2B9Y0KlNXl9u/vsW6sTIu9vGEpfKu2wRV6l1H3XEas/0gUIzGzBoP/IouTcUQbm9JWZLH3COxyn03TYlFax6w==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "semver": "^7.5.3"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
     "node_modules/socket.io": {
       "version": "4.8.1",
       "resolved": "https://registry.npmjs.org/socket.io/-/socket.io-4.8.1.tgz",
@@ -2436,6 +2731,19 @@
         "safe-buffer": "~5.2.0"
       }
     },
+    "node_modules/supports-color": {
+      "version": "5.5.0",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
+      "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "has-flag": "^3.0.0"
+      },
+      "engines": {
+        "node": ">=4"
+      }
+    },
     "node_modules/tarn": {
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/tarn/-/tarn-3.0.2.tgz",
@@ -2466,6 +2774,19 @@
         "node": ">=18.17"
       }
     },
+    "node_modules/to-regex-range": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
+      "integrity": "sha512-65P7iz6X5yEr1cwcgvQxbbIw7Uk3gOy5dIdtZ4rDveLqhrdJP+Li/Hx6tyK0NEb+2GCyneCMJiGqrADCSNk8sQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "is-number": "^7.0.0"
+      },
+      "engines": {
+        "node": ">=8.0"
+      }
+    },
     "node_modules/toidentifier": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",
@@ -2475,6 +2796,16 @@
         "node": ">=0.6"
       }
     },
+    "node_modules/touch": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/touch/-/touch-3.1.1.tgz",
+      "integrity": "sha512-r0eojU4bI8MnHr8c5bNo7lJDdI2qXlWWJk6a9EAFG7vbhTjElYhBVS3/miuE0uOuoLdb8Mc/rVfsmm6eo5o9GA==",
+      "dev": true,
+      "license": "ISC",
+      "bin": {
+        "nodetouch": "bin/nodetouch.js"
+      }
+    },
     "node_modules/tslib": {
       "version": "2.8.1",
       "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.8.1.tgz",
@@ -2495,6 +2826,13 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/undefsafe": {
+      "version": "2.0.5",
+      "resolved": "https://registry.npmjs.org/undefsafe/-/undefsafe-2.0.5.tgz",
+      "integrity": "sha512-WxONCrssBM8TSPRqN5EmsjVrsv4A8X12J4ArBiiayv3DyyG3ZlIg6yysuuSYdZsVz3TKcTg2fd//Ujd4CHV1iA==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/undici-types": {
       "version": "7.16.0",
       "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-7.16.0.tgz",
diff --git a/package.json b/package.json
index bca58cf..0a8bc8a 100644
--- a/package.json
+++ b/package.json
@@ -2,9 +2,11 @@
   "name": "category-syncer",
   "version": "1.0.0",
   "description": "Library to sync JTL categories to local cache",
-  "main": "category-syncer.js",
+  "main": "src/index.js",
   "type": "module",
   "scripts": {
+    "dev": "nodemon src/index.js",
+    "start": "node src/index.js",
     "test": "node index.js"
   },
   "dependencies": {
@@ -14,5 +16,8 @@
     "openai": "^6.9.1",
     "sharp": "^0.34.5",
     "socket.io": "^4.8.1"
+  },
+  "devDependencies": {
+    "nodemon": "^3.1.11"
   }
-}
+}
\ No newline at end of file
diff --git a/src/index.js b/src/index.js
index 9dba6f2..aa5e4b2 100644
--- a/src/index.js
+++ b/src/index.js
@@ -29,7 +29,7 @@ categorySyncer.on('synced', async ({ tree, unprunedTree, changed }) => {
     traverse(unprunedTree);
 
     //console.log(`🔍 Found ${imageIds.length} images and ${categoryIds.length} categories.`);
-    
+
     await pictureSyncer.syncImages(imageIds, 'categories');
     await categoryProductsSyncer.syncProducts(categoryIds);
 });
diff --git a/src/server/routes/index.js b/src/server/routes/index.js
index f63c5c8..2d17fe3 100644
--- a/src/server/routes/index.js
+++ b/src/server/routes/index.js
@@ -11,7 +11,13 @@ export function registerIndex(app, cache) {
             res.set('ETag', cache.html.etag);
             res.set('Content-Type', 'text/html');
 
-            res.send(cache.html.data);
+            // Inject ETag into HTML as meta tag
+            const htmlWithEtag = cache.html.data.replace(
+                '<head>',
+                `<head>\n    <meta name="app-version" content="${cache.html.etag}">`
+            );
+
+            res.send(htmlWithEtag);
         } catch (err) {
             console.error('Error serving index.html:', err);
             res.status(500).send('Error loading page');
diff --git a/src/server/server.js b/src/server/server.js
index e59d9b3..67cd2cf 100644
--- a/src/server/server.js
+++ b/src/server/server.js
@@ -99,7 +99,7 @@ export function startServer(categorySyncer, categoryProductsSyncer) {
     }
 
     // Register socket connection handler
-    registerConnection(io, CACHE_DIR);
+    registerConnection(io, CACHE_DIR, cache);
 
     // Register routes
     registerCategories(app, cache);
diff --git a/src/server/socket/connection.js b/src/server/socket/connection.js
index 986ebe2..b4409eb 100644
--- a/src/server/socket/connection.js
+++ b/src/server/socket/connection.js
@@ -1,9 +1,17 @@
 import { findMatches } from '../utils/search-helper.js';
 
-export function registerConnection(io, cacheDir) {
+export function registerConnection(io, cacheDir, cache) {
     io.on('connection', (socket) => {
         console.log('🔌 Client connected');
 
+        socket.on('checkVersion', (clientEtag) => {
+            const serverEtag = cache.html.etag;
+            if (clientEtag !== serverEtag) {
+                console.log(`⚠️  Version mismatch - Client: ${clientEtag}, Server: ${serverEtag}`);
+                socket.emit('versionMismatch', { serverEtag });
+            }
+        });
+
         socket.on('search', async (query) => {
             // console.log(`🔍 Search request: "${query}"`);
             try {
diff --git a/src/utils/database.js b/src/utils/database.js
index 8530229..3b6e7e1 100644
--- a/src/utils/database.js
+++ b/src/utils/database.js
@@ -7,7 +7,7 @@ const config = {
     user: process.env.DB_USER,
     password: process.env.DB_PASSWORD,
     server: process.env.DB_HOST,
-    port: process.env.DB_PORT,
+    port: parseInt(process.env.DB_PORT, 10),
     database: process.env.DB_DATABASE,
     options: {
         encrypt: false, // Adjust based on server config