Fix environment variables handling

.github/workflows/build-backend.yml

@@ -83,6 +83,9 @@ jobs:
         push: true
         tags: ${{ steps.meta.outputs.tags }}
         labels: ${{ steps.meta.outputs.labels }}
+        build-args: |
+          "GITHUB_REF=${{ github.ref }}"
+          "GITHUB_SHA=${{ github.sha }}"
     
     # This step generates an artifact attestation for the image,
     # which is an unforgeable statement about where and how it was built.

backend/Dockerfile

@@ -13,6 +13,8 @@ COPY ./manage.py ./manage.py
 # Swith user
 USER puzzle
 # Set variables
+ARG GITHUB_REF
+ARG GITHUB_SHA
 ENV BRANCH=${GITHUB_REF}
 ENV COMMIT=${GITHUB_SHA}
 # Run server