Description The webpage provides an overview of the architecture of Open OnDemand, a web-based interface for high-performance computing (HPC) resources. It explains how the system uses Apache as a front-end proxy to authenticate users, manage Per-User NGINX (PUN) instances, and facilitate access to interactive applications like Jupyter and RStudio. The page includes system and container context diagrams, detailing how user requests are processed securely and efficiently within the OnDemand framework.