Port the qualified web preview at c41e6fa8940fba929704bc2f9a94f119fef4a4ca onto
org dev b4d498e697. Preserve upstream changes and
branch policies; keep the independent private Collector service separate.
Preview-Version: 2.2.1-n30nex.1
Preview-Revision: c41e6fa8940fba929704bc2f9a94f119fef4a4ca
* docs: move deployment to beacon-docs and add SHOULDERS
* docs: keep only web-specific contributor notes
* docs: show the dev proxy settings needed for live updates