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/entrypoint.sh

@@ -1,6 +1,14 @@
 #!/bin/bash
 set -e
 
+VERSION_FILE="/etc/wireguard/VERSION"
+if [ -f "$VERSION_FILE" ]; then
+    VERSION=$(cat "$VERSION_FILE")
+else
+    VERSION="unknown"
+fi
+echo "[init] VPN Container Entrypoint ${VERSION}"
+
 INTERFACE="wg0"
 MOUNT_CONFIG="/etc/wireguard/${INTERFACE}.conf"
 CONFIG_DIR="/run/wireguard"