Update gems and config

Gemfile

@@ -1,14 +1,21 @@
 source 'https://rubygems.org'
 git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
-
+# Ruby 3.3+ compatibility gems
+gem 'logger'
+gem 'bigdecimal' # Will be removed from stdlib in Ruby 3.4
+gem 'ostruct'    # Will be removed from stdlib in Ruby 3.5
+gem 'mutex_m'    # Will be removed from stdlib in Ruby 3.4
+gem 'fiddle'     # Will be removed from stdlib in Ruby 3.5
 
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails', branch: 'main'
 gem 'rails', '~> 6.1.3', '>= 6.1.3.2'
-# Use sqlite3 as the database for Active Record
-gem 'sqlite3', '~> 1.4'
-# Use Puma as the app server
+# Use sqlite3 as the database for Active Record - updated for Ruby 3.3 compatibility
+gem 'sqlite3', '~> 1.6.0'
+# Use Puma as the app server - updated for Ruby 3.3 compatibility
 gem 'puma', '~> 5.0'
+# Updated nio4r for Ruby 3.3 compatibility
+gem 'nio4r', '~> 2.7'
 # Use Active Model has_secure_password
 # gem 'bcrypt', '~> 3.1.7'
 
@@ -18,23 +25,18 @@ gem 'puma', '~> 5.0'
 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]
+  gem 'rspec-rails', '~> 5.0.0'
 end
 
 group :development do
   gem 'listen', '~> 3.3'
+  gem 'foreman', '~> 0.87.2'
+  gem 'rubocop'
 end
 
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
 gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
 
-group :development do
-  gem 'foreman', '~> 0.87.2'
-end
-
-group :development, :test do
-  gem 'rspec-rails', '~> 5.0.0'
-end
-
 group :test do
   gem 'rspec-json_expectations'
   gem 'shoulda-matchers', '~> 4.0'