I've found that is relatively simple to enable public access to the file served by livecode using a free service like ngrok.
I made a brief tutorial, here: https://bitsandbricks.github.io/post/code-live-from-rstudio-and-share-it-with-the-world-in-real-time/
Could ngrok integration be rolled into livecode? i.e in a similar fashion to the already present bit.ly support.