message: enable firestore persistence
diff: @@ -15,7 +15,11 @@ const config = {
  firebase.initializeApp(config);
  export const auth = firebase.auth();
  +
  export const db = firebase.firestore();
  +db.settings({ cacheSizeBytes: firebase.firestore.CACHE_SIZE_UNLIMITED });
  +db.enablePersistence();
  +
  export const bucket = firebase.storage();
  export const functions = firebase.functions();
  export const googleProvider = new firebase.auth.GoogleAuthProvider();
  