Adds Gravitational's Teleport to Gateways and Terminal Sharing (#2667)

Co-authored-by: nodiscc <nodiscc@gmail.com>

README.md

@@ -878,6 +878,7 @@ Games, game servers and control panels.
 - [OS.js](https://www.os-js.org/) - Desktop implementation for your browser with a fully-fledged window manager, Application APIs, GUI toolkits and filesystem abstraction. ([Demo](https://demo.os-js.org/), [Source Code](https://github.com/os-js/OS.js)) `BSD-2-Clause` `Nodejs`
 - [ShellHub](https://www.shellhub.io) - ShellHub is a modern SSH server for remotely accessing linux devices via command line (using any SSH client) or web-based user interface, designed as an alternative to sshd. Think ShellHub as centralized SSH for the the edge and cloud computing. ([Source Code](https://github.com/shellhub-io/shellhub)) `Apache-2.0` `Go/Other`
 - [Sshwifty](https://github.com/nirui/sshwifty) - Sshwifty is a SSH and Telnet connector made for the Web. `AGPL-3.0` `Go/Docker`
+- [Teleport](https://goteleport.com/) - Certificate authority and access plane for SSH, Kubernetes, web applications, and databases. ([Source Code](https://github.com/gravitational/teleport)) `Apache-2.0` `Go`
 - [tmate](https://tmate.io/) - Instant terminal sharing. ([Source Code](https://github.com/tmate-io/tmate)) `ISC` `C`