fix(learninggoalhub): pin nginx upstream to the unique server container name#9
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…er name The web container also sits on the shared hestia-edge network, where another app's compose service named `server` registers the same generic DNS alias and shadows our upstream — nginx then proxies /api to the wrong app's container (502 on staging since examlense joined hestia-edge). Resolve the Spring server by its unique container_name instead.
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What changed and why
Staging has served 502 for all learninggoalhub API calls since examlense's server joined the shared
hestia-edgenetwork (#6): Compose registers the service nameserveras a DNS alias there, and our web container (also onhestia-edge) resolved its nginx upstreamserverto the examlense container instead of our own Spring server.client/nginx.conf: proxy tolearninggoalhub-server:8080(uniquecontainer_name, only resolvable on our private network) instead of the generic service name.infra/traefik/README.md: document the naming rule for services joininghestia-edge.How it was tested
docker execfrom the web container showedserverresolving to 192.168.2.5 (= examlense-server, connection refused) whilelearninggoalhub-serverruns healthy at 192.168.1.3.nginx -tpasses with the updated config (nginx:alpine).