FIX(docker): fix Dockerfile paths

- Support both local and CI builds
- Fix path references

.github/workflows/build.yml

@@ -53,7 +53,7 @@ jobs:
         id: build
         uses: docker/build-push-action@v5
         with:
-          context: .
+          context: ./services/nextjs
           file: ./deploy/docker/Dockerfile.prod
           push: true
           tags: ${{ steps.meta.outputs.tags }}