This is part of my HNG DevOps internship series. Follow along as I document every stage. A Quick Recap Stage 0 was about securing a Linux server. Stage 1 was deploying an API behind Nginx. Stage 2 was containerizing a microservices app. Stage 3 was building a DDoS detection engine. Stage 4 was writing a declarative deployment tool. Stage 5 is the most ambitious yet. This time there was no starter code. No bugs to fix. No existing app to containerize. I had to build the entire platform from scratch — a self-service system where users can spin up isolated temporary environments, deploy apps into them, simulate outages, monitor health, and have everything auto-destroyed when the lifetime expires. Think of it as a miniature internal Heroku with a chaos engineering toggle.…