Coolify's Service::parse() (called inside the deploy job) iterates ALL
ServiceApplications in a multi-container template and overwrites
SERVICE_URL_<NAME> / SERVICE_FQDN_<NAME> env vars based on whichever
inner app's fqdn it sees first — frequently a worker still pointing at
the auto-generated *.sslip.io fallback. The result: the user's custom
domain is saved, the SPA loads, but its baked-in REACT_APP_SERVER_BASE_URL
points at sslip.io and every API call 404s.
apps_domains_set now substitutes ${SERVICE_URL_<NAME>} and
${SERVICE_FQDN_<NAME>} (with optional _<port> suffix) directly in the
docker_compose_raw before calling updateCompose(), and stops calling
service->parse() — so the literal URL survives any future redeploy.
Solves Twenty CRM domain bug; also unlocks reliable custom domains for
n8n, Plausible, Mautic, and every other Coolify service template that
follows the same SERVICE_URL_X pattern.
Made-with: Cursor
Mark Henderson
652e45ac00