Update migration instructions in README

Removed redundant migration step and clarified that migrations run automatically on backend container startup. Updated related sections for better clarity and consistency.

README.md

@@ -96,13 +96,7 @@ python -c "from cryptography.fernet import Fernet; print(Fernet.generate_key().d
 make up
 ```
 
-4. Run migrations:
+4. Open the application:
-
-```bash
-make migrate
-```
-
-5. Open the application:
 
 - Frontend: `http://<SERVER_IP>:<FRONTEND_PORT>`
 - API base: `http://<SERVER_IP>:<BACKEND_PORT>/api/v1`
@@ -119,9 +113,11 @@ Initial admin bootstrap user (created from `.env` if missing):
 make up        # build and start all services
 make down      # stop all services
 make logs      # follow compose logs
-make migrate   # run alembic upgrade head in backend container
+make migrate   # optional/manual: run alembic upgrade head in backend container
 ```
 
+Note: Migrations run automatically when the backend container starts (`entrypoint.sh`).
+
 ## Configuration Reference (`.env`)
 
 ### Application