Update readme.md

readme.md

@@ -7,6 +7,31 @@
 
 </div>
 
+## How to use
+Please check `tests` folder for more examples.
 
+in browser
+
+```js
+
+const WebdggridLocal = await import("../dist/index.js").then(m => m.Webdggrid).catch(console.log);
+import { Webdggrid as WebdggridExternal } from "https://cdn.jsdelivr.net/npm/webDggrid/dist/index.js";
+
+const Webdggrid = WebdggridLocal ?? WebdggridExternal;
+
+const webdggrid = await Webdggrid.load();
+const seqNum = dggs.geoToSequenceNum([[0, 0]]);
+
+```
+
+
+In nodejs
+
+```js
+import { Webdggrid } from 'webdggrid'
+const dggs = await Webdggrid.load();
+const seqNum = dggs.geoToSequenceNum([[0, 0]]);
+
+```
 
 ### Under development