feat: live Docker data — containers, services, logs, metrics via dockerode

- Backend: rewrote containers/services/logs/metrics routes to use dockerode
- docker-compose: mount /var/run/docker.sock, run backend as root
- .drone.yml: sync docker-compose.yml from Gitea on deploy
- Frontend: Containers page shows real data with wired start/stop/restart
- Frontend: Services page shows Docker Compose stacks with health status
- Frontend: Metrics page adds disk (docker df) and containers cards + chart legend
- Frontend: Logs page replaces text input with container dropdown + auto-refresh

.drone.yml

@@ -91,14 +91,20 @@ steps:
   # ─── Deploy ────────────────────────────────────────────────────────────────
   - name: deploy
     image: appleboy/drone-ssh
+    environment:
+      GITEA_TOKEN:
+        from_secret: gitea_token
     settings:
       host: 100.116.40.103
       username: root
       key:
         from_secret: ssh_private_key
+      envs:
+        - GITEA_TOKEN
       port: 22
       script:
         - cd /opt/server-manager
+        - curl -sfH "Authorization:token $GITEA_TOKEN" https://git.jiosii.com/api/v1/repos/ops/server-manager/raw/docker-compose.yml -o docker-compose.yml
         - docker compose pull
         - docker compose up -d --remove-orphans
         - docker image prune -f