Fix issues in the Docker docs and add an important note on static media.
Review Request #2341 — Created Nov. 10, 2021 and updated
This fixes a few typos in the Docker documentation (including ones in examples that confused users), and adds a callout about how a dedicated web server is required in order to serve up static media. These were common pain points for users trying to get set up, so hopefully these changes make for a more clear experience. Testing Done: Built the docs and checked the affected areas. Reviewed at https://reviews.reviewboard.org/r/11722/