message: feat(docs): Add Table of Contents
diff: <p align="right"><em>See more on <a href="https://jestjs.io">jestjs.io</a></em></p>
  +## Table of Contents
  +
  +- [Getting Started](#getting-started)
  +- [Running from command line](#running-from-command-line)
  +- [Additional Configuration](#additional-configuration)
  + - [Generate a basic configuration file](#generate-a-basic-configuration-file)
  + - [Using Babel](#using-babel)
  + - [Using Webpack](#using-webpack)
  + - [Using Typescript](#using-typescript)
  +- [Documentation](#documentation)
  +- [Badge](#badge)
  +- [Contributing](#contributing)
  + - [Code of Conduct](#code-of-conduct)
  + - [Contributing Guide](#contributing-guide)
  + - [Good First Issues](#good-first-issues)
  +- [Credits](#credits)
  + - [Backers](#backers)
  + - [Sponsors](#sponsors)
  +- [License](#license)
  +
  ## Getting Started
  <!-- copied from Getting Started docs, links updated to point to Jest website -->
  