✨ feat: 重构构建工作流，分离前端和后端构建步骤

.github/workflows/build.yaml

@@ -7,7 +7,7 @@ on:
   workflow_dispatch:
 
 jobs:
-  build-and-push:
+  build-and-push-frontend:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
@@ -29,9 +29,23 @@ jobs:
           push: true
           tags: ${{ secrets.DOCKERHUB_USERNAME }}/neo-blog-frontend:latest
 
+  build-and-push-backend:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to DockerHub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
       - name: Build and push backend image
         uses: docker/build-push-action@v5
         with:
           context: .
           push: true
-          tags: ${{ secrets.DOCKERHUB_USERNAME }}/neo-blog-backend:latest
+          tags: ${{ secrets.DOCKERHUB_USERNAME }}/neo-blog-backend:latest