[docs] publish MkDocs site from Forgejo Actions

README.md

@@ -120,6 +120,16 @@ API and workflow docs are generated from the package docstrings with
 [MkDocs](https://www.mkdocs.org/), [Material for MkDocs](https://squidfunk.github.io/mkdocs-material/),
 and [mkdocstrings](https://mkdocstrings.github.io/).
 
+When hosted on a Forgejo instance, the intended setup is:
+
+- publish the generated site from a dedicated `docs-site` branch
+- serve that branch from the instance's static-pages host
+- point the repository's **Wiki** tab at the published docs URL
+
+The repository contains a Forgejo Actions workflow for publishing the docs
+branch automatically. Set the repository variable `DOCS_SITE_URL` to the final
+published URL so MkDocs can generate canonical links correctly.
+
 Install the docs toolchain with:
 
 ```bash
@@ -138,6 +148,9 @@ This produces:
 - a combined printable single-page HTML site under `site/print_page/`
 - an optional fully inlined `site/standalone.html` when `htmlark` is available
 
+The same build output is what the Forgejo Actions workflow publishes to the
+`docs-site` branch.
+
 The docs build uses a local MathJax bundle vendored under `docs/assets/`, so
 the rendered HTML does not rely on external services for equation rendering.