Updated readme

README.md

@@ -1,2 +1,21 @@
 # sharp-read-bmp
+Function for reading bmp and ico and returning a sharp instance
 
+Installation
+----------------------------------------------------------------
+```
+npm install @valkyriecoms/sharp-read-bmp
+```
+
+Usage
+----------------------------------------------------------------
+
+```javascript
+import { sharpBmp } from 'sharp-read-bmp';
+import { fileTypeFromFile } from 'file-type';
+
+const { mime } = await fileTypeFromFile('favicon.ico');
+const sharpCtx = await sharpBmp('favicon.ico', mime);
+
+console.log(await sharpCtx.metadata());
+```