Rewrite docs/RELEASE.md from scratch for
#672: a terms list, what is
needed, and six numbered steps, each with its check. Every statement is
checked against the Makefile, script/, build.js, the two workflows and the
tests. The step that described distribution routes not built is cut. The
reproducibility claim names the build date that build.js compiles in, so it
holds only within one UTC day.
The commit carries the findings of the three reviews, the last two in the
third review's wording: the self-contained check is described with the
browser's directory as its subject, and Node and yarn must be on the PATH,
because script/bootstrap leaves an nvm install off it.
Model: fable-5-1
sneak