old_contents: module.exports = app => {
  	app.get("/", (req, res) => {
  		res.json({status: "PDF extract API"});
  	});
  };
new_contents: module.exports = app => {
  	app.get("/", (req, res) => {
  		res.json({status: "PDF extract api"});
  	});
  };
subject: Update index.js