Update all Ruby dependencies (#59)

Reviewed-on: #59

config/initializers/content_security_policy.rb

@@ -20,6 +20,10 @@
 #   config.content_security_policy_nonce_generator = ->(request) { request.session.id.to_s }
 #   config.content_security_policy_nonce_directives = %w(script-src style-src)
 #
+#   # Automatically add `nonce` to `javascript_tag`, `javascript_include_tag`, and `stylesheet_link_tag`
+#   # if the corresponding directives are specified in `content_security_policy_nonce_directives`.
+#   # config.content_security_policy_nonce_auto = true
+#
 #   # Report violations without enforcing the policy.
 #   # config.content_security_policy_report_only = true
 # end

config/initializers/cors.rb

@@ -0,0 +1,16 @@
+# Be sure to restart your server when you modify this file.
+
+# Avoid CORS issues when API is called from the frontend app.
+# Handle Cross-Origin Resource Sharing (CORS) in order to accept cross-origin Ajax requests.
+
+# Read more: https://github.com/cyu/rack-cors
+
+# Rails.application.config.middleware.insert_before 0, Rack::Cors do
+#   allow do
+#     origins "example.com"
+#
+#     resource "*",
+#       headers: :any,
+#       methods: [:get, :post, :put, :patch, :delete, :options, :head]
+#   end
+# end

config/initializers/new_framework_defaults_8_1.rb

@@ -8,3 +8,21 @@
 #
 # Read the Guide for Upgrading Ruby on Rails for more info on each option.
 # https://guides.rubyonrails.org/upgrading_ruby_on_rails.html
+
+###
+# Skips escaping HTML entities and line separators. When set to `false`, the
+# JSON renderer no longer escapes these to improve performance.
+#
+# Example:
+#   class PostsController < ApplicationController
+#     def index
+#       render json: { key: "\u2028\u2029<>&" }
+#     end
+#   end
+#
+# Renders `{"key":"\u2028\u2029\u003c\u003e\u0026"}` with the previous default, but `{"key":"

<>&"}` with the config
+# set to `false`.
+#
+# Applications that want to keep the escaping behavior can set the config to `true`.
+#++
+# Rails.configuration.action_controller.escape_json_responses = false