Readme update

README.md

@@ -50,7 +50,7 @@ or any other hosted Postgres database by data source.
         - Check that empty database has been created: 
           - ![<img width="20" height="20"/>](assets/empty_database.png)
           
-6. Create DB schema: `altium`. It will be used as default schema
+6. ***Optionally:*** Create DB schema, or `altium` will be created as default schema. It will be used for all migrations
 7. When all has been configured and empty Database created. Then run application
 
 ***Local development***