refactor: 重构 Docker 镜像 CI 流程，合并构建和推送步骤

Author: AptS-1547

.github/workflows/docker-image.yml

@@ -3,16 +3,35 @@ name: Docker Image CI
 on:
   push:
     branches: [ "master" ]
+    tags:
+      - 'v*'
   pull_request:
     branches: [ "master" ]
 
 jobs:
-
-  build:
-
+  build-and-push:
     runs-on: ubuntu-latest
 
+    if: github.event_name != 'pull_request'
+    
     steps:
-    - uses: actions/checkout@v4
-    - name: Build the Docker image
-      run: docker build . --file Dockerfile --tag e1saps/onebot-github-webhook:$(date +%s)
+    - name: Checkout code
+      uses: actions/checkout@v4
+      
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+      
+    - name: Login to Docker Hub
+      uses: docker/login-action@v3
+      with:
+        username: ${{ secrets.DOCKERHUB_USERNAME }}
+        password: ${{ secrets.DOCKERHUB_TOKEN }}
+        
+    - name: Build and push
+      uses: docker/build-push-action@v5
+      with:
+        context: .
+        push: ${{ github.event_name != 'pull_request' }}
+        tags: |
+          e1saps/onebot-github-webhook:latest
+          ${{ github.event_name == 'push' && startsWith(github.ref, 'refs/tags/') && format('e1saps/onebot-github-webhook:{0}', github.ref_name) || format('e1saps/onebot-github-webhook:{0}', github.sha) }}