Initialaze a Firebase project for Apollo server

.firebaserc

{
  "projects": {
    "default": "the-id-of-your-project"
  }
}

firebase.json

{
  "functions": {
    "source": "."
  }
}

package.json

{
  "main": "./firebase-functions.js",
  "scripts": {
    "functions": "firebase serve --only functions",
    "deploy": "firebase deploy --only functions"
  },
  "engines": {
    "node": "8"
  },
  "dependencies": {
    "firebase-admin": "7.2.0",
    "firebase-functions": "2.2.1"
  }
}