📖 updated readme

README.md

@@ -1,18 +1,38 @@
 # AWS SES SMTP password generator
 
-Browser tool to convert AWS secret access keys into AWS SES (Simple Email
+Browser tool to convert AWS Secret Access Keys into AWS SES (Simple Email
 Service) passwords.
 
-Available in [https://github.com/tofran/aws-ses-smtp-credentials](https://github.com/tofran/aws-ses-smtp-credential)
+Available in [https://tofran.github.io/aws-ses-smtp-credentials][static site].
+
+## Library
+
+This repo contains both a [static site] hosted on GitHub Pages, and an
+[NPM library] (`aws-ses-smtp-credentials`) to convert Secret Access Keys
+into an SMTP passwords:
+
+**Installation**
+
+`npm install --save aws-ses-smtp-credentials`
+
+**Usage**
+
+```js
+import { getSESSmtpPassword } from "aws-ses-smtp-credentials";
+
+getSESSmtpPassword(secretAccessKey, region);
+```
+
+[npm library]: https://www.npmjs.com/package/aws-ses-smtp-credentials
+[static site]: https://tofran.github.io/aws-ses-smtp-credentials
 
 ## Why?
 
 AWS [provides a Python script](https://docs.aws.amazon.com/ses/latest/dg/smtp-credentials.html)
-to make this conversion. One could make a simple shell alias to perform this
+to make this conversion. One could create a simple shell alias to perform this
 conversion (note that some adaptation is needed to avoid leaking credentials
 to the shell history).
-
-I have always wondered why there isn't a javascript version for the browser
-already - that does not use Node's crypto module.
+But, I have always wondered why there isn't already a Javascript version (for
+the browser - that does not use Node's crypto module).
 Thus I took it as an opportunity to try a few new things and port it to
 `crypto-js`.