The project is built using Parcel and for that you need to have node.js installed. The easiest option is to install node via nvm (node version manager).
Here you can install nvm: https://github.com/nvm-sh/nvm#installing-and-updating
Then you can install nodejs:
nvm install v17.7.1
Lastly, you have to install all required packages, including parcel (after pulling this repository):
npm install
Now to start developing, simply run:
npm run dev
You can view the developed website at http://localhost:1234
When you are ready to deploy, you build the website into the public folder by running:
npm run build
The website becomes live the moment it gets pushed to github.