```JavaScript
// knexfile.js
module.exports = {
  development: {
    client: 'pg',
    connection: {
      database: config.get('db:database'),
      user: config.get('db:user'),
      password: config.get('db:password'),
      host: config.get('db:host'),
      port: config.get('db:port'),
    }
  },
  test: {
    client: 'pg',
    connection: {
      database: config.get('testDB:database'),
      user: config.get('testDB:user'),
      password: config.get('testDB:password'),
      host: config.get('testDB:host'),
      port: config.get('testDB:port'),
    }
  }
};
```