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

backend/package.json

@@ -19,9 +19,11 @@
   "dependencies": {
     "bcryptjs": "^3.0.3",
     "cors": "^2.8.5",
+    "dockerode": "^3.3.5",
     "dotenv": "^16.4.5",
     "express": "^4.18.2",
     "helmet": "^7.1.0",
+    "jose": "^5.9.6",
     "jsonwebtoken": "^9.0.2",
     "morgan": "^1.10.0",
     "pg": "^8.11.3",
@@ -30,6 +32,7 @@
   "devDependencies": {
     "@types/bcryptjs": "^2.4.6",
     "@types/cors": "^2.8.17",
+    "@types/dockerode": "^3.3.9",
     "@types/express": "^4.17.21",
     "@types/jsonwebtoken": "^9.0.5",
     "@types/morgan": "^1.9.9",