In this project I used a mix of HTML, JavaScript, CSS and React.
Make you sure you have installed Node (if not, you can download it from here).
Clone the repo to your computer and install dependencies:
$ git clone https://github.com/jsgilberto/Markdown-Previewer.git
$ cd Markdown-Previewer
$ npm install
Once you have the repo in your local computer, go into the repo and run the following command:
$ npm start
It will open a window in your browser and you are ready to go!