I love the idea of an online REPL for people to try out languages no-install.
BEAM languages such as Erlang, LFE or Elixir have already an REPL.
Plus they're kind of all the same, meaning you implement support for one & and all the others are done!
There are already official docker images for Erlang at least.
Granted, the communities of these languages are not large, but repl.it
can change that!
Thanks for your work