Add docs to build the project

Author: FagnerMartinsBrack

CONTRIBUTING.md

@@ -10,4 +10,24 @@
 
 ## Development
 
-// TODO
+### Tools
+We use the following tools for development:
+
+- [Maven](https://maven.apache.org/) for Java Build.
+- [NodeJS](http://nodejs.org/download/) required to run grunt.
+- [Grunt](http://gruntjs.com/getting-started) for JavaScript task management.
+
+### Getting started
+
+Install [NodeJS](http://nodejs.org/).  
+Install [Maven](https://maven.apache.org/download.cgi) and add `mvn` as a global alias to run the `/bin/mvn` command inside Maven folder.
+
+Browse to the project root directory and run the build:
+
+    $ mvn install
+
+After the build completes you should be the following message in the console:
+
+    ----------------------------------------------------------------------------
+    BUILD SUCCESS
+    ----------------------------------------------------------------------------