As a security measure it is advisable to hide the server name.
I don't know who to set it up by hand. I searched through Jester's settings document (and code) but couldn't find one that sets the server name. As an example, Beego (the framework I have used in Go) allows setting the servername using config: [https://beego.me/docs/mvc/controller/config.md](https://beego.me/docs/mvc/controller/config.md)
