feat(vpn): add version logging from VERSION file

- Read version from /etc/wireguard/VERSION instead of hardcoding
- Copy VERSION file into container image during build
- Update VERSION to v1.1.0

Docker/Containerfile

@@ -13,7 +13,8 @@ RUN apk add --no-cache \
 # Create wireguard config directory (config is mounted at runtime)
 RUN mkdir -p /etc/wireguard
 
-# Copy entrypoint
+# Copy version file and entrypoint
+COPY VERSION /etc/wireguard/VERSION
 COPY entrypoint.sh /entrypoint.sh
 RUN chmod +x /entrypoint.sh