ci: add Drone pipeline, production Docker setup, frontend Dockerfile

.drone.yml

@@ -0,0 +1,30 @@
+kind: pipeline
+type: docker
+name: production-deploy
+
+# Trigger on every push to main
+trigger:
+  branch:
+    - main
+  event:
+    - push
+
+steps:
+  - name: deploy
+    image: appleboy/drone-ssh
+    settings:
+      host:
+        from_secret: deploy_host
+      username: root
+      port: 22
+      key:
+        from_secret: deploy_ssh_key
+      # Pull latest code, rebuild containers, reload Caddy
+      script:
+        - cd /opt/project-hub/src
+        - git pull origin main
+        - docker compose -f docker-compose.prod.yml up -d --build --force-recreate --remove-orphans
+        - docker network connect pm-network caddy 2>/dev/null || true
+        - docker exec caddy caddy reload --config /etc/caddy/Caddyfile --force
+        - docker image prune -f
+        - echo "Deploy complete."