If you have minimal needs, you could use a simple ticket system like the Erlang ticket system Joe Armstrong described in 2014: https://joearms.github.io/publis

If you have minimal needs, you could use a simple ticket system like the Erlang ticket system Joe Armstrong described in 2014: https://joearms.github.io/published/2014-06-25-minimal-viable-program.html https://joearms.github.io/published/2014-06-25-minimal-viabl... In use from 1985 to 2014 and maybe longer.