Update README.md

README.md

@@ -8,10 +8,26 @@
   <img src="https://img.shields.io/website/https/miguelpimentel.do.svg" />
 </p>
 
-## Introduction
+## Overview
 
 Personal website powered by [Zola](https://www.getzola.org/), and themed with [serene](https://github.com/isunjn/serene).
 
+## Table of Contents
+
+<details>
+<summary>Show/Hide</summary>
+
+- [Overview](#overview)
+- [Table of Contents](#table-of-contents)
+- [Screenshot](#screenshot)
+- [Changes from Upstream](#changes-from-upstream)
+  - [Accessibility](#accessibility)
+  - [Useful Commands](#useful-commands)
+- [Acknowledgments](#acknowledgments)
+- [License](#license)
+
+</details>
+
 ## Screenshot
 
 ![website screenshot](screenshot-1.png)