Merge pull request #71 from essentialkaos/develop

Improve GitHub Actions CI workflow

Author: andyone

.github/workflows/ci.yml

@@ -97,6 +97,9 @@ jobs:
 
       - name: Login to DockerHub
         uses: docker/login-action@v1
+        env:
+          DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
+        if: ${{ env.DOCKERHUB_USERNAME != '' }}
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
@@ -133,6 +136,9 @@ jobs:
 
       - name: Login to DockerHub
         uses: docker/login-action@v1
+        env:
+          DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
+        if: ${{ env.DOCKERHUB_USERNAME != '' }}
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}