doc(README): add table of contents

README.md

@@ -43,6 +43,33 @@ High-level features include:
 [Clair]: https://github.com/coreos/clair
 [Swagger]: http://swagger.io
 
+## Table of Contents
+
+1. **[Getting Started](#getting-started)**
+  1. [macOS](#macos)
+  2. [Useful Docs](#useful-docs)
+  3. [Linux](#linux)
+2. **[Development](#development)**
+  1. [PivotalTracker Integration](#pivotaltracker-integration)
+3. **[Running and Testing](#running-and-testing)**
+  1. [Test Data](#test-data)
+  2. [Local Scripts](#local-scripts)
+  3. [Development inside Docker](#development-inside-docker)
+  4. [Adding a Python Dependency](#adding-a-python-dependency)
+  5. [Running the Build System](#running-the-build-system)
+  6. [To run individual tests](#to-run-individual-tests)
+    1. [Pytest](#pytest)
+    2. [Tox](#tox)
+  7. [Running Migrations](#running-migrations)
+  8. [How to run a build with tests for a push or merge](#how-to-run-a-build-with-tests-for-a-push-or-merge)
+4. **[Documentation](#documentation)**
+  1. [Architecture at a Glance](#architecture-at-a-glance)
+  2. [Terminology](#terminology)
+    1. [Organizations](#organizations)
+    2. [Concepts](#concepts)
+    3. [Software](#software)
+
+
 ## Getting Started
 
 ### macOS
@@ -105,9 +132,15 @@ npm link typescript
 [pyenv](https://github.com/yyuu/pyenv)
 [pyenv-virtualenv](https://github.com/yyuu/pyenv-virtualenv)
 
-### Developing
 
-#### PivotalTracker Integration
+
+### Linux
+
+TODO
+
+## Development
+
+### PivotalTracker Integration
 
 Tag a commit with the Tracker Story ID and GitHub automatically comments on your
 story with the commit message.
@@ -125,10 +158,6 @@ with "Finishes", the trigger will also click Finish on the story.
 Reference: PivotalTracker blog - [A Guide to GitHub’s Service Hook for Tracker](https://www.pivotaltracker.com/blog/guide-githubs-service-hook-tracker/)
 
 
-### Linux
-
-TODO
-
 ## Running and Testing
 
 ### Test Data