No hype, just use simple, proven technologies. No MongoDB, no React, ideally no SPA at all, just plain HTML and tiny bits of Javascript when/if needed. My pers

No hype, just use simple, proven technologies. No MongoDB, no React, ideally no SPA at all, just plain HTML and tiny bits of Javascript when/if needed. My personal pick would be a Django app with Postgres as the DB, Django REST framework for the API endpoints (if needed), Redis for caching, and that's pretty much it. Platform is irrelevant as it might change in the long term, so I'll pick whatever is easiest/cheapest at the time and be done with it; the platform can always be swapped out later if needed.