rsnext/examples/with-firebase-authentication/next.config.js

require('dotenv').config()

module.exports = {
  env: {
    FIREBASE_AUTH_DOMAIN: process.env.FIREBASE_AUTH_DOMAIN,
    FIREBASE_DATABASE_URL: process.env.FIREBASE_DATABASE_URL,
    FIREBASE_PROJECT_ID: process.env.FIREBASE_PROJECT_ID,
    FIREBASE_PUBLIC_API_KEY: process.env.FIREBASE_PUBLIC_API_KEY,
  },
}