I like using repl.it to easily share small scripts over to other people. But what if you want to share a whole code repository that is hosted on GitHub? What do you do?
Well, you write a deployment script on repl.it that downloads the latest version of the codebase from the GitHub repository, install all dependencies, and then run the code. That's what you do.
Here's a blog post I wrote that details how I did that: https://tra38.github.io/blog/deploying-github-repos-onto-repl-it.html
It's not quite a tutorial, since all it does is tell you the weird stuff I had to do to get this to work, but it should be fairly easy to learn from it (in case you have to do something like this).