Helmet

An extra layer of protection.

Once again, quoting the official NestJS Docs:

Helmet can help protect your app from some well-known web vulnerabilities by setting HTTP headers appropriately. Generally, Helmet is just a collection of smaller middleware functions that set security-related HTTP headers.

First, we need to install it.

yarn add helmet

Then, still in the main file, use it after enabling CORS.

app.use(helmet());

Commit - Adding helmet