MdnsLite.set_host

You're seeing just the function set_host, go back to MdnsLite module for more information.

Set the list of host names

host can have the value of :hostname in which case the value will be replaced with the value of :inet.gethostname(), otherwise you can provide a string value. You can specify an alias hostname in which case host will be ["hostname", "alias-example"]. The second value must be a string. When you use an alias, an "A" query can be made to alias-example.local as well as to hostname.local. This can also be configured at runtime via MdnsLite.set_host/1:

iex> MdnsLite.set_host([:hostname, "nerves"])
:ok