Cloudflare is a web-infrastructure and website-security company, providing content-delivery-network services, DDoS mitigation, Internet security, and distributed domain-name-server services.
Express is a web application framework for Node.js, released as free and open-source software under the MIT License. It is designed for building web applications and APIs.
Gravatar is a service for providing globally unique avatars.
HTTP/3 is the third major version of the Hypertext Transfer Protocol used to exchange information on the World Wide Web.