feat: 添加 Docker 健康检查，创建 Docker 发布工作流

Author: CharyeahOwO

.dockerignore

@@ -8,3 +8,8 @@ images
 public/images/**
 !public/images/.gitkeep
 !public/images/**/.gitkeep
+.tmp-uploads/
+.playwright-mcp/
+*.png
+!public/images/**/*.png
+.github

.github/workflows/docker-publish.yml

@@ -0,0 +1,33 @@
+name: Build and Push Docker Image
+
+on:
+  push:
+    branches: [main]
+  workflow_dispatch:
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          tags: |
+            ${{ secrets.DOCKERHUB_USERNAME }}/nyaovo-random-image-api:latest
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

Dockerfile

@@ -12,4 +12,6 @@ RUN mkdir -p /app/public/images && chown -R node:node /app
 USER node
 
 EXPOSE 3000
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+  CMD wget -qO- http://localhost:3000/image/health || exit 1
 CMD ["npm", "start"]