fix: use correct build directory when namespacing expert

Author: doorgan

justfile

@@ -84,7 +84,7 @@ build-expert:
   #!/usr/bin/env bash
   cd apps/expert
   MIX_ENV={{ env('MIX_ENV', 'prod')}} mix compile
-  just namespace-expert
+  just namespace-expert _build/{{ env('MIX_ENV', 'prod') }}
 
 [doc('Start the local development server')]
 start *opts="--port 9000": build-engine