The above solution is applicable to Apache. You will also need mod_rewrite enabled. For nginx it is a little more involved but it is covered in our manual:
You can edit the node and give it a "URL portion".
Note that if you provide a "URL portion" and you ever change it to something else then old links to the old URL portion will no longer work. Easily solved with a server-side redirect but ideally don't change the URL portion unless totally necessary.