secrets can not be used in if

Author: robkooper

.github/workflows/docker.yml

@@ -29,6 +29,8 @@ env:
 jobs:
   docker:
     runs-on: ubuntu-latest
+    env:
+      dockerhub: ${{ secrets.DOCKERHUB_USERNAME }}
     permissions:
       packages: write
     strategy:
@@ -129,7 +131,7 @@ jobs:
 
       # login to registries
       - name: Login to DockerHub
-        if: secrets.DOCKERHUB_USERNAME != ""
+        if: env.dockerhub != ''
         uses: docker/login-action@v2
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
@@ -196,7 +198,7 @@ jobs:
 
       # update README at DockerHub
       - name: Docker Hub Description
-        if: matrix.README != '' && github.event_name == 'push' && github.repository == env.MASTER_REPO && env.BRANCH == 'master'
+        if: env.dockerhub != '' && matrix.README != '' && github.event_name == 'push' && github.repository == env.MASTER_REPO && env.BRANCH == 'master'
         uses: peter-evans/dockerhub-description@v2
         env:
           DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}