fix: don't push docker on pr due to security

.github/workflows/build_docker.yml

@@ -46,6 +46,7 @@ jobs:
         uses: docker/setup-buildx-action@v3
 
       - name: Login to DockerHub
+        if: github.event_name == 'push'
         uses: docker/login-action@v3
         with:
           username: xhofe
@@ -57,7 +58,7 @@ jobs:
         with:
           context: .
           file: Dockerfile.ci
-          push: true
+          push: ${{ github.event_name == 'push' }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
           platforms: linux/amd64,linux/arm64,linux/arm/v7,linux/386,linux/arm/v6,linux/s390x
@@ -67,7 +68,7 @@ jobs:
         uses: docker/build-push-action@v5
         with:
           file: Dockerfile.ffmpeg
-          push: true
+          push: ${{ github.event_name == 'push' }}
           tags: ${{ steps.meta-ffmpeg.outputs.tags }}
           labels: ${{ steps.meta-ffmpeg.outputs.labels }}
           platforms: linux/amd64,linux/arm64,linux/arm/v7,linux/386,linux/arm/v6,linux/s390x

.github/workflows/del-pr-docker.yml

@@ -1,24 +0,0 @@
-name: delete closed pr docker tag
-
-on:
-  pull_request:
-    types: [closed]
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
-  cancel-in-progress: true
-
-jobs:
-  del_docker_tag:
-    name: Build Docker
-    runs-on: ubuntu-latest
-    steps:
-
-      - name: Delete docker tag
-        id: del_docker_tag
-        uses: xhofe/del-docker-tag@main
-        with:
-          username: xhofe
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
-          # token: ${{ secrets.DOCKER_TOKEN }}
-          tags: xhofe/alist:pr-${{ github.event.pull_request.number }},xhofe/alist:pr-${{ github.event.pull_request.number }}-ffmpeg