laravel configurar el fitxer .env

APP_NAME=example-app
APP_ENV=local
APP_KEY=base64:aO1T7D9Qx+pQ5kjDIXrPcHIflOX2WImlT1U0kqROtCQ=
APP_DEBUG=true
APP_URL=http://example-app.test/

LOG_CHANNEL=stack
LOG_DEPRECATIONS_CHANNEL=null
LOG_LEVEL=debug

DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=example-app
DB_USERNAME=root
DB_PASSWORD=