Single-container docker-compose recipe for running numa in ODoH client
mode. Ships with a starter numa.toml pointing at odoh-relay.numa.rs
paired with Cloudflare's ODoH target — two independent operators with
distinct eTLD+1s, so the default passes numa's same-operator check.
Exposes :53 UDP+TCP for LAN clients and :5380 for the dashboard + REST
API. README covers prerequisites, deploy, verification, and the ODoH
privacy boundary (relay sees IP, target sees query, neither sees both).
Advertised alongside packaging/relay/ in the main README Docker section.
