message: migrate app.js changes to app.ts
diff: @@ -3,6 +3,7 @@ import morgan from 'morgan';
  import compression from 'compression';
  import cors from 'cors';
  import { json } from 'body-parser';
  +import { graphqlUploadExpress } from 'graphql-upload';
  import { logger } from './loggers/logger';
  import { createRouter } from './routes';
  import { authMiddleware } from './authMiddleware';
  @@ -33,4 +34,6 @@ app.use(authMiddleware);
  // Add routes.
  app.use('/', createRouter());
  +app.use(graphqlUploadExpress());
  +
  apolloServer.applyMiddleware({ app });
  