add badges and usage

README.md

@@ -1,5 +1,24 @@
 # NCIC Lookup
 
+[![DeepSource](https://app.deepsource.com/gh/cityssm/node-ncic-lookup.svg/?label=active+issues&show_trend=true&token=wV_h2WD2q1m0xm80kHAXVGGC)](https://app.deepsource.com/gh/cityssm/node-ncic-lookup/)
+[![Maintainability](https://api.codeclimate.com/v1/badges/1fed08589ce516f0ff69/maintainability)](https://codeclimate.com/github/cityssm/node-ncic-lookup/maintainability)
+[![codecov](https://codecov.io/gh/cityssm/node-ncic-lookup/graph/badge.svg?token=8BCT6BZDU8)](https://codecov.io/gh/cityssm/node-ncic-lookup)
+
 Lookups and helper functions for FBI National Crime and Information Center (NCIC) codes.
 
 Built using the XSD file from the [National Information Exchange Model (NEIM) 5.0](https://release.niem.gov/niem/5.0/).
+
+## Installation
+
+```sh
+npm install @cityssm/ncic-lookup
+```
+
+## Usage
+
+```javascript
+import * as ncicLookup from '@cityssm/ncic-lookup'
+
+console.log(await ncicLookup.getFieldValueDescription('VMA', 'GMC'))
+// "GENERAL MOTORS CORP."
+```