FILL: title (e.g. "Container view — Ordering system")

FILL: scope note (e.g. "System-in-focus dashed; externals solid").

FILL: C4 container / context diagram FILL: Uses [HTTPS] FILL: Calls [JSON/HTTP] FILL: Reads/writes [SQL] FILL: Calls [REST] FILL: Customer [Person] FILL: Web App [Container: React] FILL: API Service [Container: Node] FILL: Database [Container: Postgres] FILL: Payments [External System]