Minor changes to the dummy app

To make it work with:
`bin/appraisal rails61-activeadmin rails s`

Author: Mattia Roccoberton

bin/rails

@@ -1,29 +1,18 @@
 #!/usr/bin/env ruby
 # frozen_string_literal: true
 
-#
-# This file was generated by Bundler.
-#
-# The application 'rails' is installed as part of a gem, and
-# this file is here to facilitate running it.
-#
+# This command will automatically be run when you run "rails" with Rails gems
+# installed from the root of your application.
 
-require "pathname"
-ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../../Gemfile",
-  Pathname.new(__FILE__).realpath)
+ENV['RAILS_ENV'] ||= 'test'
 
-bundle_binstub = File.expand_path("../bundle", __FILE__)
+ENGINE_ROOT = File.expand_path('..', __dir__)
+ENGINE_PATH = File.expand_path('../lib/activeadmin/dynamic_fields/engine', __dir__)
+APP_PATH = File.expand_path('../spec/dummy/config/application', __dir__)
 
-if File.file?(bundle_binstub)
-  if File.read(bundle_binstub, 300) =~ /This file was generated by Bundler/
-    load(bundle_binstub)
-  else
-    abort("Your `bin/bundle` was not generated by Bundler, so this binstub cannot run.
-Replace `bin/bundle` by running `bundle binstubs bundler --force`, then run this command again.")
-  end
-end
+# Set up gems listed in the Gemfile.
+ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../Gemfile', __dir__)
+require 'bundler/setup' if File.exist?(ENV['BUNDLE_GEMFILE'])
 
-require "rubygems"
-require "bundler/setup"
-
-load Gem.bin_path("railties", "rails")
+require 'rails/all'
+require 'rails/engine/commands'

spec/dummy/.ruby-version

@@ -15,3 +15,5 @@
 // For example, to change the default status-tag color:
 //
 //   .status_tag { background: #6090DB; }
+
+.red { color: #a00; }

spec/dummy/.tool-versions

@@ -1,7 +1,7 @@
 # Be sure to restart your server when you modify this file.
 
 # Version of your assets, change this if you want to expire all your assets.
-Rails.application.config.assets.version = '1.0'
+# Rails.application.config.assets.version = '1.0'
 
 # Add additional assets to the asset load path.
 # Rails.application.config.assets.paths << Emoji.images_path

spec/dummy/app/assets/stylesheets/active_admin.scss

@@ -1,3 +1,5 @@
 Rails.application.routes.draw do
   ActiveAdmin.routes(self)
+
+  root to: redirect('/admin')
 end

spec/dummy/config/initializers/assets.rb

@@ -14,9 +14,9 @@
       # See additional options for Dockerized environment in the respective section of this article
       browser_options: browser_options,
       # Increase Chrome startup wait time (required for stable CI builds)
-      process_timeout: 10,
+      process_timeout: 15,
       # The number of seconds we'll wait for a response when communicating with browser. Default is 5
-      timeout: 10,
+      timeout: 15,
       # Enable debugging capabilities
       inspector: true,
       # Allow running Chrome in a headful mode by setting HEADLESS env var to a falsey value