chore: fix docker context

Author: collins-w

.github/workflows/docker-stg.yaml

@@ -59,8 +59,8 @@ jobs:
         uses: docker/build-push-action@471d1dc4e07e5cdedd4c2171150001c434f0b7a4 # v6.15.0
         id: push
         with:
-          context: ./packages/ui/api/stellar
-          file: Dockerfile.prod
+          context: ./contracts-wizard/packages/ui/api/stellar
+          file: ./contracts-wizard/packages/ui/api/stellar/Dockerfile.prod
           platforms: linux/arm64
           push: true
           tags: |