Verified live via WSL Docker (docker compose up --wait): every other F0
service came up healthy, but web stayed unhealthy. Root cause was two
compounding issues, both invisible to static review:
1. Docker auto-sets HOSTNAME to the container ID; Next's standalone
server.js honors that env var and binds only to it instead of all
interfaces. Fixed by explicitly setting ENV HOSTNAME=0.0.0.0 in the
Dockerfile, after Docker's automatic assignment.
2. Even bound to 0.0.0.0 (IPv4), the healthcheck's `wget http://localhost`
resolved localhost to ::1 (IPv6) first inside the container, where
nothing was listening. Fixed by pointing the healthcheck at
127.0.0.1 explicitly instead of localhost.
Full stack (db, redis, migrate, auth, storage, protocols, web) now
reaches healthy end-to-end under docker compose up --wait.
Lucas Rayan
7c91182111