Helmet is an Express middleware package that sets HTTP headers to help protect applications against common web vulnerabilities.

It configures headers such as:

• Content-Security-Policy.
• X-Content-Type-Options.
• Referrer-Policy.
• Strict-Transport-Security under appropriate conditions.

Helmet is already installed in our project.

Register it near the beginning of Express application initialization.

Review the default configuration and customize it according to your deployment requirements.

import helmet from 'helmet';

app.use(helmet());