its in progress....
You should really only need to make changes to the .md files in content/
Any static resources like images or pdfs should live in static/images and static/pdfs etc. This allows you to use relative urls to link to it by ../static/images/image.jpg, for example. Note the use of ../ instead of static/
Once you are happy with the changes, simply push the changes to github and the rest will take care of itself.
Simply run
hugo server
in a terminal. This will print the url to open to see the website