Upgrade to Rails 7

Upgrade to Rails 7 with `rails new` default project scaffolding

Fixes hotwired#11 Content Policy prevented stimulus controller from loading which caused message input to not clear on submit

Gemfile

@@ -1,62 +1,72 @@
-source 'https://rubygems.org'
+source "https://rubygems.org"
 git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
-ruby '2.7.1'
+ruby "3.1.2"
 
-# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
-gem 'rails', '~> 6.1.3'
+# Bundle edge Rails instead: gem "rails", github: "rails/rails", branch: "main"
+gem "rails", "~> 7.0.3"
+
+# The original asset pipeline for Rails [https://github.com/rails/sprockets-rails]
+gem "sprockets-rails"
 
 # Use sqlite3 as the database for Active Record
-gem 'sqlite3', '~> 1.4'
+gem "sqlite3", "~> 1.4"
+
+# Use the Puma web server [https://github.com/puma/puma]
+gem "puma", "~> 5.0"
 
-# Use Puma as the app server
-gem 'puma', '~> 5.0'
+# Use JavaScript with ESM import maps [https://github.com/rails/importmap-rails]
+gem "importmap-rails"
 
-# Use SCSS for stylesheets
-gem 'sass-rails', '>= 6'
+# Hotwire's SPA-like page accelerator [https://turbo.hotwired.dev]
+gem "turbo-rails"
 
-# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
-gem 'jbuilder', '~> 2.7'
+# Hotwire's modest JavaScript framework [https://stimulus.hotwired.dev]
+gem "stimulus-rails"
 
-# Use Hotwire for the frontend
-gem 'hotwire-rails'
+# Build JSON APIs with ease [https://github.com/rails/jbuilder]
+gem "jbuilder"
 
-# Use Redis for Action Cable
-gem 'redis', '~> 4.0'
+# Use Redis adapter to run Action Cable in production
+gem "redis", "~> 4.0"
 
-# Use Active Model has_secure_password
-# gem 'bcrypt', '~> 3.1.7'
+# Use Kredis to get higher-level data types in Redis [https://github.com/rails/kredis]
+# gem "kredis"
 
-# Use Active Storage variant
-# gem 'image_processing', '~> 1.2'
+# Use Active Model has_secure_password [https://guides.rubyonrails.org/active_model_basics.html#securepassword]
+# gem "bcrypt", "~> 3.1.7"
+
+# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
+gem "tzinfo-data", platforms: %i[ mingw mswin x64_mingw jruby ]
 
 # Reduces boot times through caching; required in config/boot.rb
-gem 'bootsnap', '>= 1.4.4', require: false
+gem "bootsnap", require: false
+
+# Use Sass to process CSS
+# gem "sassc-rails"
+
+# Use Active Storage variants [https://guides.rubyonrails.org/active_storage_overview.html#transforming-images]
+# gem "image_processing", "~> 1.2"
 
 group :development, :test do
-  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
-  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
+  # See https://guides.rubyonrails.org/debugging_rails_applications.html#debugging-with-the-debug-gem
+  gem "debug", platforms: %i[ mri mingw x64_mingw ]
 end
 
 group :development do
-  # Access an interactive console on exception pages or by calling 'console' anywhere in the code.
-  gem 'web-console', '>= 4.1.0'
-
-  # Display performance information such as SQL time and flame graphs for each request in your browser.
-  # Can be configured to work on production as well see: https://github.com/MiniProfiler/rack-mini-profiler/blob/master/README.md
-  # gem 'rack-mini-profiler', '~> 2.0'
+  # Use console on exceptions pages [https://github.com/rails/web-console]
+  gem "web-console"
 
-  gem 'listen', '~> 3.3'
+  # Add speed badges [https://github.com/MiniProfiler/rack-mini-profiler]
+  # gem "rack-mini-profiler"
 
-  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
-  gem 'spring'
+  # Speed up commands on slow machines / big apps [https://github.com/rails/spring]
+  # gem "spring"
 end
 
 group :test do
-  # Adds support for Capybara system testing and selenium driver
-  gem 'capybara', '>= 3.26'
-  gem 'selenium-webdriver'
-
-  # Easy installation and use of web drivers to run system tests with browsers
-  gem 'webdrivers'
+  # Use system testing [https://guides.rubyonrails.org/testing.html#system-testing]
+  gem "capybara"
+  gem "selenium-webdriver"
+  gem "webdrivers"
 end