build: only build on main brnach with tags

Author: Neunerlei

.github/workflows/publish-dockerimage.yml

@@ -29,7 +29,6 @@ jobs:
       - name: Extract tag name
         id: tag
         shell: bash
-        if: github.ref_type == 'tag'
         run: |
           if [[ ${{ github.ref }} == refs/tags/* ]]; then
             echo "tag=${GITHUB_REF#refs/tags/}" >> $GITHUB_OUTPUT
@@ -49,12 +48,6 @@ jobs:
           username: ${{ secrets.DOCKER_USERNAME }}
           password: ${{ secrets.DOCKER_PASSWORD }}
 
-      - name: Extract metadata (tags, labels) for Docker
-        id: meta
-        uses: docker/metadata-action@9ec57ed1fcdbf14dcef7dfbe97b2010124a938b7
-        with:
-          images: digitalenvironments/hawki
-
       - name: Build and push Docker image
         id: push
         uses: docker/build-push-action@v6.15.0