knexfile.js

// Update with your config settings.

module.exports = {

  development: {
    client: 'sqlite3',
    useNullAsDefault: true,
    connection: {
      filename: './data/sqlite3.db3'
    },
    migrations: {
      directory: './data/migrations',
      tableName: 'dbmigrations',
    },
    seeds: {
      directory: './data/seeds'
    },
    pool: {
      min: 2,
      max: 3,
    },
  },

  staging: {
    client: 'postgresql',
    connection: {
      database: 'my_db',
      user:     'username',
      password: 'password'
    },
    pool: {
      min: 2,
      max: 10
    },
    migrations: {
      tableName: 'knex_migrations'
    }
  },

  production: {
    client: "sqlite3",
    useNullAsDefault: true,
    connection: {
      filename: "./data/sqlite3.db3",
    },
    pool: {
      afterCreate: (conn, done) => {
        conn.run("PRAGMA foreign_keys = ON", done);
      },
    },
    migrations: {
      directory: "./data/migrations",
    },
    seeds: {
      directory: "./data/seeds",
    },
  },
};