Example of env file:

PORT=3333
HOST=0.0.0.0
NODE_ENV=development
APP_KEY=lY8jwhmYAt2jzo2G2fmjCH7B3TfHC9Nk
DB_CONNECTION=mysql
MYSQL_HOST=localhost
MYSQL_PORT=3306
MYSQL_USER=admin
MYSQL_PASSWORD=password
MYSQL_DB_NAME=adonisjs
SMTP_HOST=smtp.ethereal.email
SMTP_PORT=587
SMTP_USERNAME=[email protected]
SMTP_PASSWORD=raZ4gbvDRBJEEPC47g
CACHE_VIEWS=false

First launch :

npm install
npm run dev