CI/CD: Use github context and ensure lowercase image name

.gitea/workflows/docker-publish.yml

@@ -12,11 +12,15 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Log in to Gitea Registry
-        run: echo "${{ secrets.GITEA_TOKEN }}" | docker login git.pengzhan.dev -u "${{ gitea.actor }}" --password-stdin
+        run: echo "${{ secrets.GITEA_TOKEN }}" | docker login git.pengzhan.dev -u "${{ github.actor }}" --password-stdin
 
+      # 有些 Gitea 环境下，docker build 可能需要 sudo，或者特定的权限
       - name: Build and push Docker image
         run: |
-          IMAGE_NAME="git.pengzhan.dev/${{ gitea.repository }}"
-          docker build -t $IMAGE_NAME:latest -t $IMAGE_NAME:${{ gitea.sha }} .
-          docker push $IMAGE_NAME:latest
-          docker push $IMAGE_NAME:${{ gitea.sha }}
+          IMAGE_NAME="git.pengzhan.dev/${{ github.repository }}"
+          # 转换为小写，防止因为仓库名包含大写导致镜像推送失败
+          IMAGE_NAME_LC=$(echo "$IMAGE_NAME" | tr '[:upper:]' '[:lower:]')
+          
+          docker build -t $IMAGE_NAME_LC:latest -t $IMAGE_NAME_LC:${{ github.sha }} .
+          docker push $IMAGE_NAME_LC:latest
+          docker push $IMAGE_NAME_LC:${{ github.sha }}