AWS Version of jasper server, customizing the server

Is it possible to customize Jasper Server itself on the AWS version? I'm not certain if this is possible as it's packaged as an AMI (amazon machine image). I'm not looking to do anything advanced, just want to white label the system. However, from a technical perspective, it's all the same. I'd need to modify Jasper Server files. I'm assuming this is possible, but want to verify before committing to that solution.

Has anyone had experience customizing AWS JS, or can confirm wether or not it's possible?

Thanks!