SSO icon does not load on MFE login page

Hi, here it is:

$ tutor mounts list
- name: lms,cms,lms-worker,cms-worker:/home/cloud/src/edx-platform:/openedx/edx-platform
  build_mounts:
  - image: openedx
    context: edx-platform
  - image: openedx-dev
    context: edx-platform
  compose_mounts:
  - service: lms
    container_path: /openedx/edx-platform
  - service: cms
    container_path: /openedx/edx-platform
  - service: lms-worker
    container_path: /openedx/edx-platform
  - service: cms-worker
    container_path: /openedx/edx-platform
- name: lms,cms,lms-worker,cms-worker:/home/cloud/src:/openedx/src
  build_mounts: []
  compose_mounts:
  - service: lms
    container_path: /openedx/src
  - service: cms
    container_path: /openedx/src
  - service: lms-worker
    container_path: /openedx/src
  - service: cms-worker
    container_path: /openedx/src
- name: /home/cloud/src/frontend-app-authn
  build_mounts:
  - image: mfe
    context: authn-src
  - image: authn-dev
    context: authn-src
  compose_mounts:
  - service: authn
    container_path: /openedx/app

I think I need a build step. In the container, I can see the compiled output under /openedx/dist, but I can’t see the source. I’m trying tutor images build mfe which looks promising.