mnpn.dev is my personal website containing my projects, blog, and contact information.
If you're going to create a PR, you might want to check how your changes look. As I use Jekyll, you can not simply open the index file in your browser.
Assuming you've successfully cloned the repository, you'll have to install Jekyll. Jekyll requires Ruby, and you can download it with instructions at their website. Installing Jekyll and getting it up and running is rather simple:
$ cd mnpn.github.io
$ gem install jekyll bundler
$ bundle exec jekyll serve
Then, you can navigate to 127.0.0.1:4000 in your browser, and see your local copy of the website.
The website automatically updates when a file is saved because you supplied Jekyll with the serve argument.