refactor: Limits docker image pushing to git pushes to main branch

.forgejo/workflows/images.yml

@@ -1,4 +1,4 @@
-name: Build Hello World Image
+name: Build (and tag) Images
 
 on:
   push:
@@ -23,26 +23,29 @@ jobs:
           username: ${{ secrets.REGISTRY_USERNAME }}
           password: ${{ secrets.REGISTRY_TOKEN }}
       
-      - name: Set image tag
+      - name: Set image tags
         id: vars
         run: |
-          if [ "${{ github.ref_name }}" = "main" ]; then
+          if [ "${{ github.ref_name }}" = "main" ] && [ "${{ github.event_name }}" = "push" ]; then
             echo "tag=latest" >> $GITHUB_OUTPUT
           else
             echo "tag=${{ github.ref_name }}" >> $GITHUB_OUTPUT
           fi
 
-      - name: Build and push web image to Container Registry
+      - name: Build images
         run: |
+          pushd ./web
           docker build -f ./Containerfile -t git.hamburg.ccc.de/ccchh/sunders/web:${{ steps.vars.outputs.tag }} .
-          docker push git.hamburg.ccc.de/ccchh/sunders/web:${{ steps.vars.outputs.tag }}
-        working-directory: ./web
-
-      - name: Build and push data_handler image to Container Registry
-        run: |
+          popd
+          pushd ./data_handler
           docker build -f ./Containerfile -t git.hamburg.ccc.de/ccchh/sunders/data_handler:${{ steps.vars.outputs.tag }} .
+          popd
+
+      - name: Push images to Container Registry
+        run: |
+          docker push git.hamburg.ccc.de/ccchh/sunders/web:${{ steps.vars.outputs.tag }}
           docker push git.hamburg.ccc.de/ccchh/sunders/data_handler:${{ steps.vars.outputs.tag }}
-        working-directory: ./data_handler
+        if: github.event_name == 'push' && github.ref_name == 'main'
 
       - name: Update docker-compose.yml image tags
         run: |