add missing docs.md

docs/docs/develop/docs.md

@@ -0,0 +1,23 @@
+# Documentation
+
+This documentation is built with the [Mkdocs](https://www.mkdocs.org/) static site generator.
+
+## Docs Setup
+
+Python is required to build the docs, then run:
+
+    pip install mkdocs-material
+
+
+## Docs Server
+
+To start the docs server, simply run:
+
+    mkdocs serve
+
+The documentation will then be available on `http://localhost:8000/`
+
+The command-line options are rebuilt using the `docs/gen-cli.sh` script.
+
+Refer to the [Mkdocs](https://www.mkdocs.org/) and [Material for MkDocs](https://squidfunk.github.io/mkdocs-material/) pages
+for more info about the documentation.