Simplified based on githubs docs

https://docs.github.com/en/actions/language-and-framework-guides/publishing-docker-images

.github/workflows/docker-publish.yml

@@ -1,70 +1,19 @@
-name: Docker
+name: Publish Docker image
-
 on:
-  push:
+  release:
-    # Publish `master` as Docker `latest` image.
+    types: [published]
-    branches:
-      - master
-
-    # Publish `v1.2.3` tags as releases.
-    tags:
-      - v*
-
-  # Run tests for any PRs.
-  pull_request:
-
-env:
-  IMAGE_NAME: expose-server
-
 jobs:
-  # Run tests.
+  push_to_registry:
-  # See also https://docs.docker.com/docker-hub/builds/automated-testing/
+    name: Push Docker image to GitHub Packages
-  test:
     runs-on: ubuntu-latest
-
     steps:
-      - uses: actions/checkout@v2
+      - name: Check out the repo
-
+        uses: actions/checkout@v2
-      - name: Run tests
+      - name: Push to GitHub Packages
-        run: |
+        uses: docker/build-push-action@v1
-          docker build . --file Dockerfile
+        with:
-
+          username: ${{ github.actor }}
-  # Push image to GitHub Packages.
+          password: ${{ secrets.GITHUB_TOKEN }}
-  # See also https://docs.docker.com/docker-hub/builds/
+          registry: docker.pkg.github.com
-  push:
+          repository: beyondcode/expose/expose-server
-    # Ensure test job passes before pushing image.
+          tag_with_ref: true
-    needs: test
-
-    runs-on: ubuntu-latest
-    if: github.event_name == 'push'
-
-    steps:
-      - uses: actions/checkout@v2
-
-      - name: Build image
-        run: docker build . --file Dockerfile --tag $IMAGE_NAME
-
-      - name: Log into registry
-        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login docker.pkg.github.com -u ${{ github.actor }} --password-stdin
-
-      - name: Push image
-        run: |
-          IMAGE_ID=docker.pkg.github.com/${{ github.repository }}/$IMAGE_NAME
-          
-          # Change all uppercase to lowercase
-          IMAGE_ID=$(echo $IMAGE_ID | tr '[A-Z]' '[a-z]')
-
-          # Strip git ref prefix from version
-          VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
-
-          # Strip "v" prefix from tag name
-          [[ "${{ github.ref }}" == "refs/tags/"* ]] && VERSION=$(echo $VERSION | sed -e 's/^v//')
-
-          # Use Docker `latest` tag convention
-          [ "$VERSION" == "master" ] && VERSION=latest
-
-          echo IMAGE_ID=$IMAGE_ID
-          echo VERSION=$VERSION
-
-          docker tag $IMAGE_NAME $IMAGE_ID:$VERSION
-          docker push $IMAGE_ID:$VERSION