Use corepack yarn in `bin/setup` (#30573)

bin/setup

@@ -13,17 +13,13 @@ FileUtils.chdir APP_ROOT do
   # This script is idempotent, so that you can run it at any time and get an expectable outcome.
   # Add necessary setup steps to this file.
 
-  puts '== Installing dependencies =='
+  puts "\n== Installing Ruby dependencies =="
   system! 'gem install bundler --conservative'
   system('bundle check') || system!('bundle install')
 
-  # Install JavaScript dependencies
-  system! 'bin/yarn'
-
-  # puts "\n== Copying sample files =="
-  # unless File.exist?('config/database.yml')
-  #   FileUtils.cp 'config/database.yml.sample', 'config/database.yml'
-  # end
+  puts "\n== Installing JS dependencies =="
+  system! 'corepack prepare'
+  system! 'bin/yarn install --immutable'
 
   puts "\n== Preparing database =="
   system! 'bin/rails db:prepare'