Added a note about specifying the target via environment variable to example at the end of the page.

This tripped me as a new user following along as I ended up building to the wrong target.

The questions are currently a level 1 heading, which is too large given the length of the questions. By changing these to level 3 headings, the visual balance of the page is improved.

By using level 3 headings for the questions, level 2 headings are available for use later to group questions once the FAQ becomes large enough. In addition, these future level 2 section headers will render in the navigation tree.