docs/build-run: Dial back the Homebrew-normativity. ;-)
docs/build-run: Dial back the Homebrew-normativity. ;-)

Probably a lot of people think you really do *need* Homebrew in
order to get GNU software and others on a Mac... but even when
helpfully supplying a `brew install` command, we can do so without
affirming that impression.

vishwesh3/zulip-mobile,vishwesh3/zulip-mobile,vishwesh3/zulip-mobile,vishwesh3/zulip-mobile