The rake task to flush the service worker fails as seen below:
$ bundle exec rake assets:flush_sw
rake aborted!
Don't know how to build task 'assets:flush_sw' (See the list of available tasks with `rake --tasks`)
Did you mean? assets:clean
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rake-13.0.1/exe/rake:27:in `<top (required)>'
/usr/local/bin/bundle:23:in `load'
/usr/local/bin/bundle:23:in `<main>'
(See full trace by running task with --trace)
WARNING: Unable to flush service worker file
Running post deploy migrations
$ bundle exec rake multisite:migrate
Multisite migrator is running using 20 threads
Migrating default
DONE
I just figured I would report this. I did a cursory search but may have missed if this is a dupe.