Web UI for the NUT UPS daemon.
UPS credentials come from .env alongside the compose file, which Compose
loads automatically; see .env.example. Required values use ${VAR:?} so a
missing .env fails loudly rather than starting the container with a blank
password.
Drop the obsolete top-level version key.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
