Documents every {{HOMEPAGE_VAR_*}} placeholder used in services.yaml
and proxmox.yaml, and notes that the real .env must live in the
project root (not config/) for Homepage/Next.js to pick it up.
Services, widgets, layout and settings for the homelab dashboard.
Secrets are externalized via {{HOMEPAGE_VAR_*}} placeholders and
supplied through a local .env file (not committed).
vogto