docsite/ becomes the repository root; the whole repository is the site.
The image is vantage/vantage-docs:latest, was mrhid6/vantage/docsite.
The workflow passes no build args, as the monorepo's did not: DOCS_URL,
DOCS_BASE_URL, APP_URL and HQ_URL have correct defaults in the
Dockerfile, and passing an unset repo variable would blank one rather
than leave it alone.
Docusaurus 3 docs-only site at docsite/, served statically by nginx under
/docs on the marketing host. Covers getting started (self-hosted install
through first server and first licence), the control plane, Vantage HQ,
a reference section and operations.
Wired into docker-compose.site.yml as docsite (3005:80) and into the
image build workflow, rebuilding on its own directory only. Never added
to the self-hosted compose file.