♻️(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

.github/workflows/impress.yml

@@ -226,13 +226,6 @@ jobs:
         working-directory: .
         run: bin/generate-jwt-private-key.sh
 
-      - name: Create the collaboration server database
-        run: |
-          PGPASSWORD=pass psql -h localhost -U dinum -d impress \
-            -c 'CREATE DATABASE yhub'
-          PGPASSWORD=pass psql -h localhost -U dinum -d yhub \
-            -f ../../docker/files/yhub/initdb/01-yhub.sql
-
       - name: Generate a MO file from strings extracted from the project
         run: uv run python manage.py compilemessages
 
@@ -245,6 +238,14 @@ jobs:
         working-directory: src/yhub-server
         run: npm ci --omit=dev
 
+      # yhub ships its own DDL and creates the database as well, so this needs
+      # the dependencies installed above — hence its place after them
+      - name: Create the collaboration server database
+        working-directory: src/yhub-server
+        env:
+          POSTGRES: postgres://dinum:pass@localhost:5432/yhub
+        run: npm run init-db
+
       - name: Start the backend for the collaboration server to authenticate against
         env:
           DJANGO_ALLOWED_HOSTS: "*"