Remove buildx, set env variable (#12)

Author: mrmeyers99

.github/workflows/autorelease.yml

@@ -54,6 +54,7 @@ jobs:
     needs: github-release
     runs-on: ubuntu-latest
     env:
+      REGISTRY: ghcr.io
       IMAGE_NAME: ${{github.repository}}
     permissions:
       contents: read
@@ -63,13 +64,10 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v2
 
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v1
-
       - name: Log in to the Container registry
         uses: docker/[email protected]
         with:
-          registry: ghcr.io
+          registry: ${{ env.REGISTRY }}
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}