fix: staging userfront build context for nginx.conf

docker/staging_pull_compose.template.yaml

@@ -339,8 +339,8 @@ services:
 
   userfront:
     build:
-      context: ./userfront
+      context: .
-      dockerfile: Dockerfile
+      dockerfile: userfront/Dockerfile
     container_name: baron_userfront
     env_file:
       - .env