Updated REAMDE for Maven use

Author: ThibaudJeannin

README.md

@@ -3,6 +3,14 @@
   <img src="src/main/resources/icon.png" align="center"/>
 </p>
 
+##How to build
+* Maven
+```bash
+git clone https://github.com/Yarhi/Murphy_Studio.git  
+mvn package  
+java -jar target/jfx/app/murphy-studio-app-1.0-SNAPSHOT-jfx.jar
+```
 
-## Participation
+
+## Contribute ?
 Wanna participate? Don't hesitate to ask us questions !