feat: add docker healthcheck on /health

docker-compose.yaml

@@ -8,6 +8,12 @@ services:
     restart: unless-stopped
     expose:
       - '8000'
+    healthcheck:
+      test: ['CMD', 'python', '-c', "import urllib.request,sys; sys.exit(0 if urllib.request.urlopen('http://127.0.0.1:8000/health',timeout=3).status==200 else 1)"]
+      interval: 30s
+      timeout: 5s
+      retries: 3
+      start_period: 10s
     environment:
       APP_DIR: /data/app
       DEPLOY_WEBHOOK: '${DEPLOY_WEBHOOK}'