Avoid warnings about gems on starting Rails

Gemfile

@@ -17,6 +17,8 @@ gem "honeybadger"
 gem "importmap-rails"
 gem "mail", ">= 2.8.0.rc1"
 gem "tzinfo-data"
+gem "mutex_m" # Added to avoid: warning: mutex_m was loaded from the standard library, but will no longer be part of the default gems since Ruby 3.4.0. Add mutex_m to your Gemfile or gemspec. Also contact author of activesupport-7.0.8.4 to add mutex_m into its gemspec.
+gem "base64" # Added to avoid: warning: base64 was loaded from the standard library, but will no longer be part of the default gems since Ruby 3.4.0. Add base64 to your Gemfile or gemspec. Also contact author of activesupport-7.0.8.4 to add base64 into its gemspec.
 
 # Assets
 gem "sassc-rails"
@@ -33,3 +35,4 @@ group :test do
   gem "capybara"
   gem "factory_bot_rails"
 end
+

Gemfile.lock

@@ -79,6 +79,7 @@ GEM
     autoprefixer-rails (10.4.16.0)
       execjs (~> 2)
     barsoom_utils (0.2.0.45)
+    base64 (0.2.0)
     bigdecimal (3.1.8)
     bootstrap-sass (3.4.1)
       autoprefixer-rails (>= 5.2.1)
@@ -138,6 +139,7 @@ GEM
     minitest (5.23.1)
     multi_xml (0.7.1)
       bigdecimal (~> 3.1)
+    mutex_m (0.2.0)
     net-imap (0.4.12)
       date
       net-protocol
@@ -276,6 +278,7 @@ PLATFORMS
 DEPENDENCIES
   attr_extras
   barsoom_utils
+  base64
   bootstrap-sass
   bootstrap_forms!
   capybara
@@ -284,6 +287,7 @@ DEPENDENCIES
   httparty
   importmap-rails
   mail (>= 2.8.0.rc1)
+  mutex_m
   pg
   pry
   puma