To use the archetype,

# Choose a project name
read -p "Project name: " PROJECT
# Clone this template
git clone https://github.com/archetypes/website-jekyll.git "$PROJECT" --origin archetype
cd "$PROJECT"
# Set the project properties (edit properties.yaml)
${EDITOR:=nano} properties.yaml
# Initialize the template
./init.rb

Reference

• Jekyll Documentation