调整持续集成，linux ci修改为centos7

.github/workflows/docker.yml

@@ -21,7 +21,7 @@ env:
 jobs:
   build:
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     permissions:
       contents: read
       packages: write
@@ -39,7 +39,6 @@ jobs:
       # Install the cosign tool except on PR
       # https://github.com/sigstore/cosign-installer
       - name: Install cosign
-        if: github.event_name != 'pull_request'
         uses: sigstore/cosign-installer@d572c9c13673d2e0a26fabf90b5748f36886883f
 
       - name: Set up QEMU
@@ -53,7 +52,6 @@ jobs:
       # Login against a Docker registry except on PR
       # https://github.com/docker/login-action
       - name: Log into registry ${{ env.REGISTRY }}
-        if: github.event_name != 'pull_request'
         uses: docker/login-action@28218f9b04b4f3f62068d7b6ce6ca5b26e35336c
         with:
           registry: ${{ env.REGISTRY }}
@@ -71,6 +69,7 @@ jobs:
       # Build and push Docker image with Buildx (don't push on PR)
       # https://github.com/docker/build-push-action
       - name: Build and push Docker image
+        if: github.event_name != 'pull_request' && github.ref != 'refs/heads/feature/test'
         id: build-and-push
         uses: docker/build-push-action@ac9327eae2b366085ac7f6a2d02df8aa8ead720a
         with: