Java servlet engine and webserver!

Eclipse Jetty provides a Web server and javax. servlet container, plus support for HTTP/2, WebSocket, OSGi, JMX, JNDI, JAAS and many other integrations. Jetty can be easily embedded in devices, tools, frameworks, application servers, and clusters.
More Information: https://www.eclipse.org/jetty/
Steps:

1. Launch Terminal by pressing command+space, type terminal and hit Enter key.
2. Run

   ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" < /dev/null 2> /dev/null

3. Install

   brew install jetty

Done!