The SSO web UI and the proxy management UI were bound to 127.0.0.1, so they
were only reachable from the host running the stack — inconvenient during
first-run setup from another machine. Make the bind address configurable
(SSO_BIND / MGMT_BIND, default 0.0.0.0) so both are LAN-reachable by default,
with a one-line flip back to 127.0.0.1 once the proxy fronts them under TLS.
Also: friendlier README with an upfront prerequisites section (domain, >=2 DNS
records to the public IP, port-forward 80/443) and a note that .env values with
spaces should be quoted.
Co-Authored-By: Claude <noreply@anthropic.com>