Extension not working

[rimonhanna]

Hi, thanks for the great work, I'm really looking forward to using your extension!

I tried installing it by copying the file index.js to project_folder/extensions/modules/api-viewer/index.js

I'm using Directus docker image using docker compose:
website-backend:
container_name: website-backend
image: directus/directus:9.22
working_dir: /app
volumes:
- ./backend:/app
restart: unless-stopped
ports:
- "8055:8055"

The extension simply doesn't show up in the side bar, not sure what's wrong. Thanks!