Put banner to let people know that this is supposed to be and OK to be on the public domain
I just found https://90cos.gitlab.io/mttl/#/ on the open web and it isn't obvious that this is something that is meant to be out in the open. I would recommend having a banner that says that this is OK to be exposed publicly; it is also suspicious to me that this isn't on a .mil domain; I'm pretty sure that isn't allowed (I know working for GSA and building out websites, we're not allowed to use anything that isn't .gov (like a .com))