chore: rename build-and-deploy job to build-image, streamline Docker build process for frontend and backend, and add deploy job for SSH-based deployment

Author: gainsborouo

.github/workflows/main.yml

@@ -47,7 +47,7 @@ jobs:
         run: pnpm run lint
         working-directory: ./frontend
 
-  build-and-deploy:
+  build-image:
     runs-on: ubuntu-latest
     needs: lint
     if: github.ref == 'refs/heads/main'
@@ -56,9 +56,6 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v2
-
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v2
 
@@ -75,7 +72,7 @@ jobs:
           context: ./frontend
           file: ./frontend/Dockerfile
           push: true
-          platforms: linux/amd64,linux/arm64
+          platforms: linux/amd64
           tags: |
             ghcr.io/nctucsunion/pastexam:frontend
             ghcr.io/nctucsunion/pastexam:frontend-${{ github.sha }}
@@ -90,9 +87,29 @@ jobs:
           context: ./backend
           file: ./backend/Dockerfile
           push: true
-          platforms: linux/amd64,linux/arm64
+          platforms: linux/amd64
           tags: |
             ghcr.io/nctucsunion/pastexam:backend
             ghcr.io/nctucsunion/pastexam:backend-${{ github.sha }}
           cache-from: type=registry,ref=ghcr.io/nctucsunion/pastexam:backend-buildcache
           cache-to: type=registry,ref=ghcr.io/nctucsunion/pastexam:backend-buildcache,mode=max
+
+  deploy:
+    runs-on: ubuntu-latest
+    needs: build-image
+    if: github.ref == 'refs/heads/main'
+
+    steps:
+      - name: Deploy via SSH
+        uses: appleboy/ssh-action@v1.0.3
+        with:
+          host: ${{ secrets.DEPLOY_HOST }}
+          username: ${{ secrets.DEPLOY_USER }}
+          key: ${{ secrets.DEPLOY_KEY }}
+          script: |
+            cd ${{ secrets.DEPLOY_DIRECTORY }}
+            if [ -n "${{ secrets.GHCR_TOKEN }}" ]; then
+              echo "${{ secrets.GHCR_TOKEN }}" | docker login ghcr.io -u "${{ secrets.GHCR_USERNAME }}" --password-stdin
+            fi
+            docker compose pull
+            docker compose up -d