Merge pull request #10 from uyjulian/ghcr_upload

Upload containers to Github Container Registry

Author: fjtrujy

.github/workflows/docker.yml

@@ -41,11 +41,28 @@ jobs:
         username: ${{ secrets.DOCKER_USERNAME }}
         password: ${{ secrets.DOCKER_PASSWORD }}
 
-    - uses: docker/build-push-action@v2
+    - name: Login to Github Container Registry
+      uses: docker/login-action@v1
+      with:
+        registry: ghcr.io
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Set docker tag list to include DockerHub if credentials available
       if: env.DOCKER_USERNAME != null
+      run: |
+        echo "DOCKER_TAG_LIST=ghcr.io/${{ github.repository }}:${{ env.DOCKER_TAG }},${{ github.repository }}:${{ env.DOCKER_TAG }}" >> $GITHUB_ENV
+
+    - name: Set docker tag list to not include DockerHub if credentials not available
+      if: env.DOCKER_USERNAME == null
+      run: |
+        echo "DOCKER_TAG_LIST=ghcr.io/${{ github.repository }}:${{ env.DOCKER_TAG }}" >> $GITHUB_ENV
+
+    - name: Build and Push to container registry
+      uses: docker/build-push-action@v2
       with:
         push: true
-        tags: ${{ github.repository }}:${{ env.DOCKER_TAG }}
+        tags: ${{ env.DOCKER_TAG_LIST }}
 
     - name: Send Compile action
       run: |