feat: Add optional system optimizations to install script, refine cron job setup, and update related documentation.

demo/README.md

@@ -95,7 +95,7 @@ fswebcam -d /dev/video0 -r 1920x1080 --no-banner test.jpg
 
 ```bash
 # View recent capture logs
-tail -f /var/log/picupper.log
+tail -f ~/picUploadApi/demo/picupper.log
 ```
 
 ### Common Issues
@@ -116,8 +116,56 @@ crontab -e
 ```
 
 Examples:
-- Every 5 minutes: `*/5 * * * * /home/pi/picupper-demo/capture-upload.sh`
-- Every 30 seconds: Use the included systemd timer (see advanced setup)
+- Every 5 minutes: `*/5 * * * * ~/picUploadApi/demo/capture-upload.sh`
+- Every 30 seconds: Use systemd timer instead of cron
+
+---
+
+## SD Card Preservation
+
+Reduce SD card writes to extend its lifetime:
+
+### Option 1: Minimal Changes (Recommended)
+
+```bash
+# Disable swap
+sudo swapoff -a
+# Comment out swap line in /etc/fstab
+sudo nano /etc/fstab
+
+# Disable automatic apt updates
+sudo systemctl disable apt-daily.timer apt-daily-upgrade.timer
+```
+
+### Option 2: Full Read-Only Mode
+
+```bash
+sudo raspi-config
+# Navigate to: Performance Options → Overlay File System → Enable
+```
+
+⚠️ **Before enabling read-only mode**, change log location to tmpfs:
+```bash
+# Edit picupper.conf
+LOG_FILE="/tmp/picupper.log"
+```
+
+---
+
+## Auto-Reboot (Stability)
+
+For long-running deployments, schedule automatic reboots:
+
+```bash
+sudo crontab -e
+```
+
+Add (reboots at 00:00, 06:00, 12:00, 18:00):
+```
+0 */6 * * * /sbin/reboot
+```
+
+---
 
 ## Hardware Requirements
 
@@ -129,3 +177,4 @@ Examples:
 ## Network Notes
 
 The script retries failed uploads and logs all attempts. If your Pi loses network, captures continue and uploads resume when connectivity returns.
+