set up firebase

      
        let firebase: {
            apiKey: 'your-key',
            authDomain: 'your-project-authdomain',
            databaseURL: 'your-database-URL',
            projectId: 'your-project-id',
            storageBucket: 'your-storage-bucket',
            messagingSenderId: 'your-messaging-sender-id'
          }