Bump rails to 7 and get tests passing. Also modified rakefile so rake

command would continue to run rspec as the default command.  Added
stylesheets to assets.rb so they'll be included when precompiling
assets in production.

Rakefile

@@ -2,5 +2,14 @@
 # for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.
 
 require_relative 'config/application'
-
 Rails.application.load_tasks
+
+begin
+  require 'rspec/core/rake_task'
+  RSpec::Core::RakeTask.new(:spec)
+
+  # task(:default).clear
+  task default: :spec
+rescue LoadError => e
+  raise e unless ENV['RAILS_ENV'] == 'production'
+end