This GitHub repository provides the source for K-9 Mail's website.
It is a combination of Markdown, HTML, CSS which is rendered by Jekyll.
Read Jekyll's Quickstart page to learn how to install the required software.
To build the site and make it available on a local server, type:
bundle exec jekyll serve
Then open http://localhost:4000/ in your browser.
Blog posts are written using Markdown. Add a new file to the _posts directory.
When adding images, you can choose whether to align them to the left, middle or right just by adding an <, >< or > at the end of the alt text for that image. If you want to know how to align other items, you can have a look at previous posts.