Don’t use env

.github/workflows/check.yml

@@ -1,9 +1,6 @@
 name: check
 on: [push]
-env:
-  REGISTRY: ghcr.io
-  IMAGE_NAME: ${{ github.repository }}/e2e
-  BRANCH_NAME: ${{ github.head_ref || github.ref_name }}
+# can't use `env` since it doesn't work in e2e.steps[0].uses
 jobs:
   lint:
     runs-on: ubuntu-22.04
@@ -27,15 +24,15 @@ jobs:
       - name: Log in to the Container registry
         uses: docker/login-action@v3
         with:
-          registry: ${{ env.REGISTRY }}
+          registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Extract metadata (tags, labels) for Docker
         id: meta
         uses: docker/metadata-action@v5
         with:
-          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          images: ghcr.io/${{ github.repository }}/e2e
 
       - name: Build and push Docker image
         uses: docker/build-push-action@v6
@@ -51,4 +48,4 @@ jobs:
     runs-on: ubuntu-22.04
     needs: build-and-push-image
     steps:
-      - uses: docker://${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ env.BRANCH_NAME }}
+      - uses: docker://ghcr.io/${{ github.repository }}/e2e:${{ github.head_ref || github.ref_name }}