First, download the NodeJS LTS package.
git clone https://github.com/bartosz-skejcik/ketamina
# or
# download the zip file and extract it
Open a terminal and go to the project's directory
cd ketamina # changing the directory
npm install # installing dependencies
npm run dev
cd ketamina
npm run build # building the project
npm run start # the website will run on the default web port (80)
# you have to be in the project's dir