Update installation instructions (#5720)
Update installation instructions (#5720)

* Update README

* Update README

* Update README

* Add join-entries.json to run instructions

* Update README.md

* Fix docker command

* Update README.md

* Update README.md

* Remove final webp reference

Co-authored-by: Arun Pattni <fc274b25fac288315343050b356e2523c045fac3@users.noreply.github.com>
jdavis/twofactorauth,jdavis/twofactorauth,jdavis/twofactorauth