Eclipse static web project HTTP Preview/Server module conflicts with relative paths

So I start a static web project on eclipse. Let's say MySite. And then I start a jetty web server on eclipse and open localhost:8080 on my browser.

This is what I'll see:

Error 404 - Not Found
No context on this server matched or handled this request.
Contexts known to this server are:

    MySite(/MySite)

So I go to localhost:8080/MySite/index.html and see my homepage... except the css/js files are not loaded and the links don't work.

That's all because of the relative paths. css/main.css directs to localhost:8080/css/main.css while it should direct to localhost:8080/MySite/main.css

How to fix this without using a workaround?