doc(sdk) update readme with badge maintainer instructions

Author: mt-dfrey

README.md

@@ -1,5 +1,38 @@
 # Moneytree Link JavaScript SDK
 
+[![NPM Badge](https://img.shields.io/badge/dynamic/json?url=https%3A%2F%2Fregistry.npmjs.org%2F%40moneytree%2Fmt-link-javascript-sdk&query=%24%5B'dist-tags'%5D%5B'latest'%5D&logo=npm&label=%40moneytree%2Fmt-link-javascript-sdk&color=14BF31)](https://www.npmjs.com/package/@moneytree/mt-link-javascript-sdk)
+
 This is a library for browser client to help you integrate Moneytree tools such as My Account and the Vault without having to do worry about the complex configurations.
 
-Read the [documentation](docs/README.md) for more information.
+## For SDK Users
+
+Read the [documentation](https://moneytree.github.io/mt-link-javascript-sdk/) for more information.
+
+## For SDK Maintainers
+
+```bash
+yarn install
+yarn lint       # runs eslint
+yarn test       # runs all the tests
+yarn build      # bundles the library
+```
+
+There is a minimal sample application in the `sample` directory.
+
+### Documentation
+
+```bash
+yarn build:docs # bundles the documentation
+yarn start:docs # Serves the documentation
+```
+
+We use [docsify](https://docsify.js.org/) to serve the documentation landing page (`docs/README.md`) and [typedoc](https://typedoc.org/) to generate the API documentation (`docs/types`).
+
+### Publishing
+
+```bash
+npm version
+# after merging the new version to master
+npm login
+npm publish
+```