add migrate to db

readme.md

@@ -23,7 +23,8 @@ Tip: Always install latest version of Docker! https://docs.docker.com/engine/ins
 	- Check if setup_db.sql ran successfully: `docker compose logs db`
 10. `docker compose run --rm pleroma mix ecto.migrate`
 11. `docker compose run --rm pleroma mix ecto.migrate --migrations-path priv/repo/optional_migrations/rum_indexing/`
-12. `docker compose up -d pleroma`
+12. If you wanted to store config in db: `docker compose run --rm pleroma mix pleroma.config migrate_to_db`
+13. `docker compose up -d pleroma`
 	- Check if running: `curl localhost:4000`
 
 Now connect your reverse proxy. For Caddy (recommended):