fix : env.DOCKER_USERNAME

Author: beachdweller

.github/workflows/docker-publish.yml

@@ -15,7 +15,7 @@ jobs:
       - name: Prepare
         id: prep
         run: |
-          DOCKERHUB_IMAGE=${{ secrets.DOCKER_USERNAME }}/${{ github.action_repository }}
+          DOCKERHUB_IMAGE=${{ env.DOCKER_USERNAME }}/${{ github.action_repository }}
           GHCR_IMAGE=ghcr.io/${{ github.repository }}
           VERSION=${GITHUB_REF#refs/tags/v}
           MINOR=${VERSION%.*}