I didn't investigate how to run the backend server (is its address configurable?) but if it can be self hosted it could be run locally. The advantage is that VMs and maybe even containers can send their history to the local server.

If it can't be self hosted, despite end to end encryption it's a big no no for me.

Edit. I read the code

  func getServerHostname() string {
    if server := os.Getenv("HISHTORY_SERVER"); server != "" {
      return server
    }
    return "https://api.hishtory.dev"
  }