Update README.md

Author: AB-xdev

README.md

@@ -5,7 +5,18 @@
 # vaadin-maps-leaflet-flow
 Vaadin Flow Java API for Leaflet Maps Component (https://leafletjs.com/)
 
+<img src="demo.png" height=550></img>
+
+## Run the Demo
+* Checkout the repo
+* Run ``mvn clean package``
+* Navigate into ``vaadin-maps-leaflet-flow-demo`` 
+* Run ``mvn jetty:run``
+* Open http://localhost:8080
+
+<details>
+  <summary>Show example</summary>
+  
+  ![demo](demo.gif)
+</details>
 
-## Demo
-To run the demo, go to `vaadin-maps-leaflet-flow-demo/` subfolder and run `mvn jetty:run`.
-After server startup, you'll be able find the demo at [http://localhost:8080/](http://localhost:8080/)