Merge pull request #3 from stefan-hoeck/docs

[ doc ] installation instructions

README.md

@@ -1,2 +1,13 @@
 # idris2-cyby-draw
-A drawing tool for the browser written in Idris2
+
+A drawing tool for molecules running in the browser and written in Idris2.
+
+## Example App
+
+To try out the example up, use [pack](https://github.com/stefan-hoeck/idris2-pack)
+to build it and open it in a browser:
+
+```sh
+pack build cyby-draw-app
+firefox app.html
+```