Not sure if you are looking for what I have mentioned below:
To get reference like it is present for avisport site, just create a folder under webapps/cs/ folder and there you can place your all static files. So if you created folder say "static" and placed all your CSS, JS and Images under it. You can directly call this location via reference, for eg, /static/js/script.js and one more step is that you have to add <context> in server.xml file (if you appserver is Apache tomcat, it is placed under apache-tomcat-XXXX/conf folder) for the "static" folder which you created.
Now suppose you want to add or update some CSS or JS files, if you are using eclipse or some other IDE, you can have ant or maven script to deploy changes in the "static" folder.
I hope this helps or gives you some idea.