elnode-linky hosts an elnode based link server.
You can register users with the server and then each user can login and post and retrieve links. A link is simply a name and HTTP url.
The idea is that if you're working on multiple devices, say a laptop and a mobile, you can post a link to your laptop host and then your mobile can just follow the link. It's faster and simpler than using a tunnel and it's temporary.
This docker requires you to provide a persistent directory for the docker volume which contains the authentication db. Emacs will create the db for you, but you need a directory where it will be mounted.
docker run -d -t nicferrier/elnode-linky -v /home/user/mylinkydb:/home/emacs/elnode-linky/db
See the github repo for more information.