I built an anonymous venting wall: no signup, no usernames, 10 languages. People post what they can't say at work or on social media, and it stays semi-anonymous. Stack: Flask + PostgreSQL + nginx on a single $6/mo VPS (2 vCPU / 894MB RAM), Docker Compose. It's survived one self-inflicted OOM outage (built a Docker image on the 894MB box - lesson learned). Happy to answer anything about the build (analytics bugs, OOM, multi-language SEO) or the cold-start problem.