Add most of the structure! plus several Base Layer docs

docs/index.rst

@@ -1,15 +1,38 @@
-.. rattail-guide documentation master file, created by
-   sphinx-quickstart on Wed Jan  6 15:33:34 2021.
-   You can adapt this file completely to your liking, but it should at least
-   contain the root `toctree` directive.
 
-Welcome to rattail-guide's documentation!
-=========================================
+Rattail Manual
+==============
+
+This is "the reference manual" for Rattail, intended primarily for developers.
+It assumes the reader is involved with the creation, customization and/or
+maintenance of a Poser/Rattail app.  It tries to explain the concepts involved
+and hopefully tie them all together.
+
+If you prefer step-by-step instructions for creating your own app then see also
+the `Rattail Tutorial`_.
+
+.. _Rattail Tutorial: https://rattailproject.org/docs/rattail-tutorial/
+
+This manual is primarily organized according to the possible "layers" of a
+Poser/Rattail app:
+
+* :doc:`base/index` - general app install, command line, plus filemon etc.
+* :doc:`data/index` - when a DB or data import/export come into it
+* :doc:`web/index` - all things web
+* :doc:`luigi/index` - using Luigi for better overnight automation
+* :doc:`deploy/index` - deals with production deployment
+* :doc:`backup/index` - backing up the production system
 
 .. toctree::
    :maxdepth: 2
    :caption: Contents:
 
+   readfirst
+   base/index
+   data/index
+   web/index
+   luigi/index
+   deploy/index
+   backup/index
 
 
 Indices and tables