chore(client): cleanup README (#137)

Co-authored-by: Cameron Meissner <[email protected]>

Author: cameronmeissner

client/README.md

@@ -1,6 +1,8 @@
 # Client
 
-[![Client module test coverage](https://github.com/Azure/aks-secure-tls-bootstrap/actions/workflows/client-coverage.yaml/badge.svg)](https://github.com/Azure/aks-secure-tls-bootstrap/actions/workflows/client-coverage.yaml)
-[![golangci-lint](https://github.com/Azure/aks-secure-tls-bootstrap/actions/workflows/golangci-lint.yaml/badge.svg)](https://github.com/Azure/aks-secure-tls-bootstrap/actions/workflows/golangci-lint.yaml)
+[![Go Report Card](https://goreportcard.com/badge/github.com/Azure/aks-secure-tls-bootstrap/client)](https://goreportcard.com/report/github.com/Azure/aks-secure-tls-bootstrap/client)
+[![Unit Tests](https://github.com/Azure/aks-secure-tls-bootstrap/actions/workflows/client-coverage.yaml/badge.svg)](https://github.com/Azure/aks-secure-tls-bootstrap/actions/workflows/client-coverage.yaml)
+[![Binary Build](https://github.com/Azure/aks-secure-tls-bootstrap/actions/workflows/client-build.yaml/badge.svg)](https://github.com/Azure/aks-secure-tls-bootstrap/actions/workflows/client-build.yaml)
+[![golangci-lint](https://github.com/Azure/aks-secure-tls-bootstrap/actions/workflows/client-golangci-lint.yaml/badge.svg)](https://github.com/Azure/aks-secure-tls-bootstrap/actions/workflows/client-golangci-lint.yaml)
 
-This module implements the AKS Secure TLS Bootstrap client, used to bootstrap kubelet client certificates without the need for TLS bootstrap tokens.
+This module implements the AKS Secure TLS Bootstrap client, used as an alternative to [TLS bootstrapping](https://kubernetes.io/docs/reference/access-authn-authz/kubelet-tls-bootstrapping/) for securely joining agent nodes to AKS control planes.