Add Turnstyle

.github/workflows/publish-image.yml

@@ -28,6 +28,11 @@ jobs:
                 username: ${{ secrets.DOCKERHUB_USERNAME }}
                 password: ${{ secrets.DOCKERHUB_TOKEN }}
 
+            - name: Limit concurrent builds to 1
+              uses: softprops/turnstyle@v1
+              env:
+                GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+                
             - name: Build and push
               id: docker_build
               uses: docker/build-push-action@v2