fix(ci): don't push image within PRs

Author: phorcys420

.github/workflows/docker-publish.yml

@@ -7,20 +7,18 @@ name: Docker
 
 on:
   push:
-    branches: [ "main" ]
+    branches: ["main"]
   pull_request:
-    branches: [ "main" ]
+    branches: ["main"]
 
 env:
   # Use docker.io for Docker Hub if empty
   REGISTRY: ghcr.io
   # github.repository as <account>/<repo>
   IMAGE_NAME: ${{ github.repository }}
 
-
 jobs:
   build:
-
     runs-on: ubuntu-latest
     permissions:
       contents: read
@@ -39,8 +37,7 @@ jobs:
         if: github.event_name != 'pull_request'
         uses: sigstore/cosign-installer@f3c664df7af409cb4873aa5068053ba9d61a57b6 #v2.6.0
         with:
-          cosign-release: 'v1.13.1'
-
+          cosign-release: "v1.13.1"
 
       # Workaround: https://github.com/docker/build-push-action/issues/461
       - name: Setup Docker buildx
@@ -69,6 +66,7 @@ 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'
         id: build-and-push
         uses: docker/build-push-action@ac9327eae2b366085ac7f6a2d02df8aa8ead720a
         with:
@@ -79,7 +77,6 @@ jobs:
           cache-from: type=gha
           cache-to: type=gha,mode=max
 
-
       # Sign the resulting Docker image digest except on PRs.
       # This will only write to the public Rekor transparency log when the Docker
       # repository is public to avoid leaking data.  If you would like to publish