Add docs, for sake of quick start guide

docs/quickstart.rst

@@ -0,0 +1,31 @@
+
+.. highlight:: sh
+
+Quick Start
+===========
+
+This should get you up and running in minutes, with a "bare" Theo setup,
+meaning no POS integration.
+
+Clone the source code for Theo wherever you like, e.g. ``~/src/theo``::
+
+   mkdir -p ~/src
+   cd ~/src
+   git clone https://kallithea.rattailproject.org/rattail-project/theo
+
+Your local PostgreSQL service should be available, and user (named ``rattail``)
+and DB (named ``theo``) created::
+
+   sudo apt install postgresql
+   sudo -u postgres createuser -P rattail
+   sudo -u postgres createdb -O rattail theo
+
+Make and activate a virtual environment, e.g. ``/srv/envs/theo``::
+
+   mkdir -p /srv/envs
+   python -m venv /srv/envs/theo
+   source /srv/envs/theo/bin/activate
+
+With the virtual environment active, run the development bootstrap script::
+
+   python ~/src/theo/dev/bootstrap.py