text: const express = require("express");
  
  const mongoose = require("mongoose");
  // const routes = require("./routes");
  const app = express();
  const PORT = process.env.PORT || 3001;
  
  // Define middleware here
  app.use(express.urlencoded({ extended: true }));
  app.use(express.json());
  // Serve up static assets (usually on heroku)
  if (process.env.NODE_ENV === "production") {
    app.use(express.static("client/build"));
  }
  // Add routes, both API and view
  // app.use(routes);
  
  // Connect to the Mongo DB
  mongoose.connect(process.env.MONGODB_URI || "mongodb://localhost/googlebooks");
  
  // Start the API server
  app.listen(PORT, function() {
    console.log(`🌎  ==> API Server now listening on PORT ${PORT}!`);
  });