ci: publish images to GHCR and create GitHub release via Drone

.drone.yml

@@ -72,6 +72,55 @@ steps:
       context: frontend/
       registry: registry.local.nothaft.cloud
 
+  # -------- NEW: Publish Docker images to GitHub Container Registry --------
+  - name: push-backend-ghcr
+    image: plugins/docker
+    settings:
+      repo: ghcr.io/the-luap/picpeak-backend
+      tags:
+        - ${DRONE_TAG}
+        - latest
+      dockerfile: backend/Dockerfile
+      context: backend/
+      registry: ghcr.io
+      username:
+        from_secret: GITHUB_USERNAME
+      password:
+        from_secret: GITHUB_TOKEN
+      build_args:
+        - VERSION=${DRONE_TAG}
+
+  - name: push-frontend-ghcr
+    image: plugins/docker
+    settings:
+      repo: ghcr.io/the-luap/picpeak-frontend
+      tags:
+        - ${DRONE_TAG}
+        - latest
+      dockerfile: frontend/Dockerfile
+      context: frontend/
+      registry: ghcr.io
+      username:
+        from_secret: GITHUB_USERNAME
+      password:
+        from_secret: GITHUB_TOKEN
+      build_args:
+        - VERSION=${DRONE_TAG}
+        - VITE_API_URL=${VITE_API_URL:-/api}
+
+  # -------- NEW: Create GitHub Release --------
+  - name: github-release
+    image: plugins/github-release
+    settings:
+      api_key:
+        from_secret: GITHUB_TOKEN
+      files: ["CHANGELOG.md"]
+      title: "PicPeak ${DRONE_TAG}"
+      note: |
+        Release ${DRONE_TAG}
+        
+        See CHANGELOG.md for full details.
+
 trigger:
   event:
     - tag