♻️(yhub) maintain database schema using npm run init-db

The yhub database schema have new update and will probably be modified
in the future. We don't want to maintain this sql schema in the Docs
repo, we want to reuse what is directly made in the yhub project. For
this we reuse the existing bin/init-db.js script

compose.yml

@@ -219,14 +219,16 @@ services:
       - env.d/development/yhub-postgres
     volumes:
       - yhub-pgdata:/var/lib/postgresql/data
-      # NOTE: initdb.d only runs on a FRESH volume; schema changes need `podman volume rm`
-      - ./docker/files/yhub/initdb:/docker-entrypoint-initdb.d:ro
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -U yhub"]
       interval: 1s
       timeout: 2s
       retries: 60
     # no published port (Django's postgres already publishes)
+    # the schema is not seeded here: initdb.d would only replay on a fresh
+    # volume, so an upgrade that adds a table would silently skip an existing
+    # one. `make migrate-yhub` runs yhub's own DDL script instead, the same way
+    # `make migrate` runs Django's migrations.
 
   yhub:
     user: ${DOCKER_USER:-1000}