Update README (#2)

Co-authored-by: Alex Fornuto <[email protected]>

Author: travisgroth

README.md

@@ -1 +1,23 @@
-# enterprise-client-go
+[![Go Reference](https://pkg.go.dev/badge/github.com/pomerium/enterprise-client-go.svg)](https://pkg.go.dev/github.com/pomerium/enterprise-client-go)
+[![Go Report Card](https://goreportcard.com/badge/github.com/pomerium/enterprise-client-go)](https://goreportcard.com/report/github.com/pomerium/enterprise-client-go)
+[![Test Status](https://img.shields.io/github/workflow/status/pomerium/enterprise-client-go/test)](https://img.shields.io/github/workflow/status/pomerium/enterprise-client-go/test)
+
+Official go client for the [Pomerium Enterprise](https://www.pomerium.com/enterprise/about.html) API.
+
+## Install
+
+```bash
+go get -u github.com/pomerium/enterprise-client-go
+```
+
+## Usage
+
+[Enterprise Setup](https://pomerium.io/enterprise/api.html)
+
+[Example](https://github.com/pomerium/enterprise-client-go/blob/master/example/main.go)
+
+## Reference
+
+[gRPC API Reference](https://github.com/pomerium/enterprise-client/blob/master/API.md)
+
+[godocs](https://pkg.go.dev/github.com/pomerium/enterprise-client-go)