Setting up and testing Express

Express is a lightweight but flexible web application framework for Node.js that we'll be using for the app. It's pretty easy to get it up and running, especially with Replit.com. So, the first thing we'll do is get Express set up on Replit.com and test it out. We'll be starting from scratch, so we'll be creating a new repl for GPTAMA.

To create a new Node.js REPL and set up Express, complete the following steps:

1. Log in at replit.com.
2. Create a new Node.js REPL named gptanswers-node. 
3. In the output pane, click on the Shell tab and enter this command:

   npx express-generator --no-view --force .

4. Run the previous command by pressing the Enter key and you should see a result that looks like the following screenshot:

   Figure 9.2 – Output from express-generator

   Important note

   The npx command is included with NPM, which is installed with Node.js. It is used to run express-generator, which creates...