DMOJ/online-judge ? reverse-engineered prompt

Build me a modern online judge and contest platform like DMOJ, with a clean public site for users to browse problems, join contests, submit solutions, and see live judging updates.

I want it to support rich problem statements with Markdown, math, and diagrams, plus editorials and PDF output for statements. Contests should handle common formats like ICPC, IOI, AtCoder, and ECOO, and let admins set things like hidden scoreboards, virtual participation, access codes, organization restricted contests, and rating. The judging side should be able to handle lots of programming languages, resource limits per language, interactive problems, custom validators, and live submission status updates. It should also include staff admin tools, user login, basic profile and activity features, and internationalized pages. If you need to look up current docs or best practices online while building it, go ahead.