From a bare Linux server, Quantum builds and runs GitHub repositories, multi-service Docker Compose stacks, and managed databases through a self-hosted PaaS dashboard with automated webhook deployments and live container telemetry. Connect a GitHub account, pick a branch, and let the build engine compile from a Dockerfile or custom install, build, and start commands on every git push or release tag. Multi-service Compose files can be pulled from a repository or pasted into the editor, with automatic `${VAR}` placeholder detection and isolated internal networks so containers communicate by service name. Provision PostgreSQL, MySQL, MariaDB, MongoDB, and Redis instances with one-click backups, or deploy pre-configured templates for n8n, Directus, WordPress, Uptime Kuma, and Ollama. Live log streams, an interactive browser terminal, `.env` secret management, persistent volume mounts, and private registry credentials come built into every service view. Need to patch a file quickly? Clicking Open in VS Code launches a sidecar `code-server` instance mounted directly to the container filesystem. Organization and project roles enforce granular access while real-time CPU, memory, and network charts track health across 15-minute to 24-hour windows. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.