Update Readme.md

Readme.md

@@ -15,3 +15,34 @@ This is a Gadgetbridge MQTT bridge for TrueNAS Scale, which allows you to connec
 
 - add new mqtt sensor around here [main.py#L90](https://git.olli.info/Oliver/GadgetbridgeMqtt/src/branch/main/main.py#L90)
 - add new function for new sensor around here [main.py#L208](https://git.olli.info/Oliver/GadgetbridgeMqtt/src/branch/main/main.py#L208)
+
+## Automated Gadgetbridge DB Shrink & Sync
+
+### 1. Install Apps (F-Droid)
+*   **Termux** (Terminal)
+*   **Termux:Boot** (Auto-start scripts)
+
+### 2. Configure Apps
+*   **Gadgetbridge:** Settings → Auto Export → Location: `/sdcard/Documents/GB_Raw`
+*   **Nextcloud:** Auto Upload → Custom Folder → Local: `/sdcard/Documents/GB_Sync` → Remote: `/Backup/Gadgetbridge`
+*   **Termux:Boot:** Open app once to initialize.
+
+### 3. Termux Setup (Run these commands)
+```bash
+# 1. Setup storage & install python
+termux-setup-storage
+pkg update -y && pkg install -y python wget
+
+# 2. Create script directories
+mkdir -p ~/scripts ~/.termux/boot
+
+# 3. Download python script
+wget -O ~/scripts/shrinkdb.py https://git.olli.info/Oliver/GadgetbridgeMqtt/raw/branch/main/termux_setup/shrinkdb.py
+
+# 4. Create autostart launcher
+printf '#!/data/data/com.termux/files/usr/bin/sh\ntermux-wake-lock\npython ~/scripts/shrinkdb.py &\n' > ~/.termux/boot/start_gb
+```
+
+### 4. Finish
+**Reboot your phone.**
+The script will now run automatically, shrinking DBs from `GB_Raw` and placing clean versions in `GB_Sync` for Nextcloud.