Update installation guide

Author: codingforentrepreneurs

Installation_Reference.md

@@ -1,4 +1,7 @@
-1. Install Python
+# Installation Reference Guide
+
+
+## 1. Install Python
 
 Most users can go [here](https://www.python.org/downloads/) to download and install `Python 3.8`.
 
@@ -8,7 +11,7 @@ brew install python
 ```
 > This will download the most recent python release. This series should be well supported in the future but if you need Python 3.8 go [here](https://www.python.org/downloads/) and find the section titled `Looking for a specific release?`
 
-2. Install Node.js
+## 2. Install Node.js
 
 Most users will go [here](https://nodejs.org/en/) to download and install `node.js`.
 
@@ -19,7 +22,7 @@ brew install node
 ```
 > This will download the most recent Node.js release. If you need another version of node here go [here](https://nodejs.org/en/) or consider using the [Node Version Manager (nvm)](https://github.com/nvm-sh/nvm)
 
-3. Install [Yarn](yarnpkg.com) (optional)
+## 3. Install [Yarn](yarnpkg.com) (optional)
 Yarn is an excellent alternative to using `npm` to install Node.js packages. Yarn caches packages so it speeds up the installs.
 
 Assuming you have Node.js installed, you should have `npm` as well. Verify `npm` is installed by: