There's no such script as `yarn dev` to run the server - fullstack-advanced

cd into server:
`yarn dev`
error Command "dev" not found.

```
"scripts": {
    "start": "nodemon -e js,graphql -x node -r dotenv/config src/index.js",
    "debug": "nodemon -e js,graphql -x node --inspect -r dotenv/config src/index.js",
    "nodemon": "nodemon"
  },
```