Add Flannel (#5028)

Co-authored-by: Phani Rithvij <[email protected]>

README.md

@@ -3122,6 +3122,7 @@ _Software written in Go._
 - [Dropship](https://github.com/chrismckenzie/dropship) - Tool for deploying code via cdn.
 - [easyssh-proxy](https://github.com/appleboy/easyssh-proxy) - Golang package for easy remote execution through SSH and SCP downloading via `ProxyCommand`.
 - [fac](https://github.com/mkchoi212/fac) - Command-line user interface to fix git merge conflicts.
+- [Flannel](https://github.com/flannel-io/flannel) - Flannel is a network fabric for containers, designed for Kubernetes.
 - [Fleet device management](https://github.com/fleetdm/fleet) - Lightweight, programmable telemetry for servers and workstations.
 - [gaia](https://github.com/gaia-pipeline/gaia) - Build powerful pipelines in any programming language.
 - [ghorg](https://github.com/gabrie30/ghorg) - Quickly clone an entire org/users repositories into one directory - Supports GitHub, GitLab, Gitea, and Bitbucket.