Update readme

Readme.md

@@ -3,4 +3,11 @@ This is a small JS-client to consume data from the geolinker.histhub.ch. The que
 
 ## Todo / Future
 * The plan is to publish the widget as a standalone web-component. So the code will be better capsulated and we can use angular 7 with ivy-compiler to pave this.
-* Remove jquery dependency
\ No newline at end of file
+* Remove jquery dependency
+
+## Build
+```bash
+npm install
+npm run bundle
+
+```