Updated workflow action

Docker container will now be build on PR but only published on release.

.github/workflows/docker-publish.yml

@@ -1,16 +1,14 @@
-name: Docker
+name: Docker_ghcr_on_release
 
 # This workflow uses actions that are not certified by GitHub.
 # They are provided by a third-party and are governed by
 # separate terms of service, privacy policy, and support
 # documentation.
 
 on:
-  push:
-    branches: [ main ]
-    # Publish semver tags as releases.
-    tags: [ 'v*.*.*' ]
-  pull_request:
+ release:
+  types: published
+ pull_request:
     branches: [ main ]
 
 env:
@@ -38,6 +36,7 @@ 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@1e95c1de343b5b0c23352d6417ee3e48d5bcd422
         with:
           cosign-release: 'v1.4.0'
@@ -50,6 +49,7 @@ 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 }}
@@ -71,5 +71,6 @@ jobs:
         uses: docker/build-push-action@ad44023a93711e3deb337508980b4b5e9bcdc5dc
         with:
           context: .
+          push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}