release: Change to two channels for images

Signed-off-by: Julius Härtl <jus@bitgrid.net>

.github/workflows/docker.yml

@@ -7,6 +7,8 @@ on:
   push:
     branches:
       - master
+  release:
+    types: [published]
 
 
 jobs:
@@ -76,19 +78,20 @@ jobs:
           platforms: linux/amd64,linux/arm64
           file: ${{ steps.dockerfile.outputs.DOCKERFILE }}
           tags: |
-            ghcr.io/juliushaertl/nextcloud-dev-${{ matrix.container }}
+            ghcr.io/juliushaertl/nextcloud-dev-${{ matrix.container }}:${{ github.sha }}
           cache-from: type=local,src=/tmp/.buildx-cache
           cache-to: type=local,dest=/tmp/.buildx-cache-new
       - name: Push container image
         uses: docker/build-push-action@v5
-        if: github.ref == 'refs/heads/master'
+        if: github.ref == 'refs/heads/master' || github.event_name == 'release'
         with:
           push: true
           context: docker/
           platforms: linux/amd64,linux/arm64
           file: ${{ steps.dockerfile.outputs.DOCKERFILE }}
           tags: |
-            ghcr.io/juliushaertl/nextcloud-dev-${{ matrix.container }}
+            ghcr.io/juliushaertl/nextcloud-dev-${{ matrix.container }}:${{ github.sha }}
+            ghcr.io/juliushaertl/nextcloud-dev-${{ matrix.container }}:${{ github.event_name == 'release' && 'latest' || 'nightly' }}
           cache-from: type=local,src=/tmp/.buildx-cache
           cache-to: type=local,dest=/tmp/.buildx-cache-new
       - name: Move cache