update readme - usage section

README.md

@@ -1,9 +1,11 @@
-# system-pri
+# System-pri
 
 System organizacji PRI
 
 
 ## Usage
+First create `.env` file and fill with similar data like `./backend/.env.example`.
+
 Run application and init database
 ```bash
 docker-compose up -d --build
@@ -19,16 +21,4 @@ docker-compose down
 Show logs
 ```bash
 docker-compose logs -f
-```
-
-## Development
-Run concrete commands: \
-For backend:
-```bash
-docker-compose exec backend flask db migrate
-```
-
-For frontend:
-```bash
-docker-compose exec frontend npm i bootstrap@4
 ```