doc: update readme

README.md

@@ -1,19 +1,25 @@
-# retryhttp
+# retryhttp [![Build Status](https://github.com/justinrixx/retryhttp/actions/workflows/go.yml/badge.svg?branch=main)](https://github.com/justinrixx/retryhttp/actions) [![Go Reference](https://pkg.go.dev/badge/github.com/justinrixx/retryhttp.svg)](https://pkg.go.dev/github.com/justinrixx/retryhttp)
 
 `retryhttp` allows you to add HTTP retries to your service or application with no refactoring at all, just a few lines of configuration where your client is instantiated. This package's goals are:
 
 - Make adding retries easy, with no refactor required (as stated above)
 - [Provide a good starting point for retry behavior](./docs/default.md)
 - [Make customizing retry behavior easy](./docs/options.md)
 - [Allow for one-off behavior changes without needing multiple HTTP clients](./docs/options.md#example)
-- 100% Go, with no external dependencies (have a peek at `go.mod`)
+- 100% standard library, with no external dependencies (have a peek at `go.mod`)
 
 ## How it works
 
 `retryhttp` exports a `Transport` struct which implements [the standard library's `http.RoundTripper` interface](https://pkg.go.dev/net/http#RoundTripper). By performing retries at the `http.RoundTripper` level, retries can be introduced to a service or script with just a few lines of configuration and no changes required to any of the code actually making HTTP requests. Regardless of which HTTP client you're using, it's very likely to have a configurable `http.RoundTripper`, which means this package can be integrated.
 
 `http.RoundTripper`s are also highly composable. By default, this package uses `http.DefaultTransport` as its underlying `RoundTripper`, but you may choose to wrap a customized one that sets `MaxIdleConns`, or even [something like this](https://pkg.go.dev/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp#Transport) that captures metric spans to instrument your calls.
 
+## Get it
+
+```bash
+$ go get github.com/justinrixx/retryhttp
+```
+
 ## Example
 
 ```go