Ideally, if you have an existing service like a local LLM running on your server (say localhost:8888) then you follow the “service template” on the server and use that address. The client template would be for the remote computer you want to connect from and you use the generated connection key and tell it what address you want to use on the second machine (say localhost:8889). Holesail does the magic of making the second address tunnel to the first.
You can do it all easily without docker too by following the holesail docs, but if your terminal session dies you will need to relaunch the connections.
@supersu has first pass apps for Android and iOS that will make mobile access super easy.