To install this theme, jekyll is required to be installed on your system. Head over to the docs and install the four requirements (Ruby, RubyGems, Node.js and Python 2.7). If you're on a Mac system, it's likely the only package you'll need to install is Node.js
Once you've installed the requirements, run this command in your terminal:
$ sudo gem install jekyll
You'll also need to install the bundler package:
$ sudo gem install bundler
Download the theme
https://github.com/pietromenna/jekyll-architect-theme/archive/master.zip
Unzip it and use it as a regular jekyll folder.
$ unzip jekyll-architect-theme-master.zip
Get inside the newly extracted folder
$ cd jekyll-architect-theme-master
Install the dependencies
$ bundle install
Use it!
$ jekyll serve
Some important configuration can be done in the file _config.yml. Please, check the Setup section in that file.
baseurl parameter is required in the case the site doesn't sit on the root of the domain. For example: https://pietromenna.github.io/jekyll-architect-theme
In the case above the baseurl should be set to "/jekyll-architect-theme".
In the case the site sits in the root, you can leave baseurl as empty "".
For more details read about [Jekyll][1] on its web page.