[doc] Enhancement: ToC for Testing Instructions
# Testing Demikernel
-This document contains instructions on how to test Demikernel. What it is covered:
+This document contains instructions on how to test Demikernel.
+
+> The instructions listed in this file assume that you have at your disposal at
+least a pair of machines with Demikernel's development environment set up. For
+more information on how to set up Demikernel's development environment, check
+out instructions in the `README.md` file.
+
+## Table of Contents
- [What are unit tests](#what-are-unit-tests)
- [How to run unit tests](#how-to-run-unit-tests)
- [What are system-level tests](#what-are-system-level-tests)
- [How to run system-level tests](#how-to-run-system-level-tests)
-> The instructions in this file assume that you have at your disposal at least one machine with Demikernel's development
-environment set up. For more information on how to set up Demikernel's development environment, check out instructions
-in the `README.md` file.
-
## What Are Unit Tests
Unit tests exercise internal components of Demikernel, individually.
