Torollo turns system-design practice into live Docker infrastructure

Why it surfaced

Torollo replaces diagram-only practice with a runnable system: learners can query Postgres, ping Redis, curl a load balancer, break the architecture, and validate the result against container state. Each pass produces a receipt of concrete observations, while the free roadmaps turn the exercises into a small bookstore’s escalating infrastructure story.

A local-first lab where dragging a database or load balancer onto a canvas creates real Docker containers, networks, shells, and graded architecture exercises.