make ci/cd action only when new release

.forgejo/workflows/docker.yml

@@ -1,11 +1,9 @@
 name: Docker
 
 on:
-  push:
-    branches:
-      - master
-    tags:
-      - 'v*'
+  release:
+    types:
+      - published
 
 jobs:
   build:
@@ -15,12 +13,7 @@ jobs:
 
       - name: Set image tag
         id: meta
-        run: |
-          if [[ "${GITHUB_REF}" == refs/tags/* ]]; then
-            echo "TAG=${GITHUB_REF#refs/tags/}" >> $GITHUB_OUTPUT
-          else
-            echo "TAG=latest" >> $GITHUB_OUTPUT
-          fi
+        run: echo "TAG=${GITHUB_REF#refs/tags/}" >> $GITHUB_OUTPUT
 
       - name: Login to Forgejo registry
         uses: docker/login-action@v3
@@ -37,8 +30,3 @@ jobs:
         run: |
           docker push git.sinfonie.org/sinfonie/photo26:${{ steps.meta.outputs.TAG }}
 
-      - name: Tag latest (for master)
-        if: github.ref == 'refs/heads/master'
-        run: |
-          docker tag git.sinfonie.org/sinfonie/photo26:${{ steps.meta.outputs.TAG }} git.sinfonie.org/sinfonie/photo26:latest
-          docker push git.sinfonie.org/sinfonie/photo26:latest