ci: refactor env vars

Author: pythoninthegrass

.github/workflows/docker.yml

@@ -40,6 +40,7 @@ env:
   REGISTRY_URL: ghcr.io
   REGISTRY_USER: ${{ github.repository_owner }}
   IMAGE_NAME: ${{ vars.IMAGE || 'meetup_bot' }}
+  DOCKERFILE: Dockerfile.web
 
 jobs:
   build-and-push:
@@ -87,6 +88,8 @@ jobs:
 
       - name: Build and push with Docker Bake
         uses: docker/bake-action@v6
+        env:
+          TAG: ${{ steps.meta.outputs.version }}
         with:
           files: ./docker-bake.hcl
           targets: multi-platform
@@ -97,8 +100,3 @@ jobs:
             *.cache-to=type=gha,mode=max,scope=${{ github.workflow }}
             *.platform=linux/amd64,linux/arm64
             *.args.PYTHON_VERSION=3.11
-            REGISTRY_URL=${{ env.REGISTRY_URL }}
-            REGISTRY_USER=${{ env.REGISTRY_USER }}
-            IMAGE_NAME=${{ env.IMAGE_NAME }}
-            TAG=${{ steps.meta.outputs.version }}
-            DOCKERFILE=Dockerfile.web