connect node server with knex database

1const knex = require('knex')({
2  client: 'mysql',
3  connection: {
4    host : '127.0.0.1',
5    port : 3306,
6    user : 'your_database_user',
7    password : 'your_database_password',
8    database : 'myapp_test'
9  }
10});