edit build.yml - edit metadata step

.gitea/workflows/build.yml

@@ -46,7 +46,10 @@ jobs:
       uses: docker/metadata-action@v3
       with:
         images: git.coopgo.io/${{gitea.repository}}
-        tags: ${{gitea.ref_name}}
+        tags: |
+          type=ref,event=branch
+          type=ref,event=tag
+          type=ref,event=pr
         flavor: |
           latest=auto