chore: replace manual SQL migrations with node-pg-migrate

README.md

@@ -35,18 +35,23 @@ npm run db:test:up
 
 This starts Postgres on `localhost:55432`, database `redefined_test`.
 
-### 2. Load the schema
+### 2. Run migrations
 
-**PowerShell:**
-```powershell
-Get-Content init.sql | docker exec -i redefined-designs-test-db psql -U redefined_test -d redefined_test
-```
+**PowerShell / bash (same command, cross-platform via Node):**
 
-**bash:**
-```bash
-docker exec -i redefined-designs-test-db psql -U redefined_test -d redefined_test < init.sql
-```
+cd backend
+$env:PGHOST="localhost"; $env:PGPORT="55432"; $env:PGUSER="redefined_test"; $env:PGPASSWORD="redefined_test"; $env:PGDATABASE="redefined_test"
+npm install
+npm run migrate:up
 
+
+This applies every migration in `backend/migrations/` in order, tracked in a `pgmigrations` table so re-running is always safe (already-applied migrations are skipped).
+
+To add a new migration:
+
+npm run migrate:create -- descriptive-name
+
+This generates a timestamped file in `backend/migrations/` with `exports.up`/`exports.down` stubs — fill in `pgm.sql(...)` for both directions.
 ### 3. Configure environment variables
 
 **PowerShell:**