Forms and Data Handling: Fix code snippet

[mhndckngyn]

Because

The added lines of code fix an error that occurs when making a request to the app after running it: Error: Failed to lookup view "index" in views directory ...

This PR

• Adds the line app.set("views", path.join(__dirname, "views"));, which set views to the directory where the template files are located.
• Adds the line const path = require("node:path");, which imports the necessary module for the aforementioned line.

Issue

Closes #XXXXX

Additional Information

Pull Request Requirements

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[mhndckngyn]

It looks like the lines I added aren't needed if the views directory is in the same location where the app is run. For example, running node ./app.js and making a request won't give an error if views are placed in ./views. It is necessary when the views directory is nested further though, like ./src/views.

This is because the Express app's views setting has the value process.cwd() + '/views' by default: https://expressjs.com/en/api.html#app.settings.table:~:text=process%2Ecwd%28%29%20%2B%20%27%2Fviews

So the error I encountered above only occurs if the views are placed in a subdirectory (./src/views in my case). The lesson does not specifically tell learners to put their code in a subdirectory, so the changes I made might not actually be necessary. It could make the setup more flexible however.