In Rogue Engine there's an established pipeline to make it simple for you to use your static assets. Don't worry though, remember that this is all built around a familiar web environment, so it's nothing any web developer hasn't seen before.
The Static Folder
The first and most important thing is that you store your static assets in Assets/Static/. Thais folder will accessible both in development and in your built project.
Static folder url
The url of the static folder will not be the same in development and in your built project. In order to get the correct path from your code you should use the getStaticPath function, which will attach the static folder address to a given path.
If you have any static files, your built project will include the Assets/Static/ folder with all its contents.