test: Fix ProcessTimeoutError when using Docker

- Error details:

Ferrum::ProcessTimeoutError:
  Browser did not produce websocket url within 10 seconds, try to increase `:process_timeout`

- Reference issue: https://github.com/rubycdp/cuprite/issues/180

spec/support/capybara.rb

@@ -1,12 +1,28 @@
 # frozen_string_literal: true
 
-Capybara.server = :puma
+require 'capybara/cuprite'
-Capybara.default_driver = Capybara.javascript_driver = :cuprite
+
+Capybara.register_driver(:capybara_cuprite) do |app|
+  browser_options = {}.tap do |opts|
+    opts['no-sandbox'] = nil if ENV['DEVEL']
+  end
+
+  Capybara::Cuprite::Driver.new(
+    app,
+    window_size: [1600, 1280],
+    browser_options: browser_options,
+    process_timeout: 20,
+    timeout: 20,
+    inspector: true,
+    headless: !ENV['CUPRITE_HEADLESS'].in?(%w[n 0 no false])
+  )
+end
+
+# Capybara.server = :puma
+Capybara.default_driver = Capybara.javascript_driver = :capybara_cuprite
 
 RSpec.configure do |config|
-  # Make sure this hook runs before others
   config.prepend_before(:each, type: :system) do
-    # Use JS driver always
     driven_by Capybara.javascript_driver
   end
 end

spec/support/capybara_cuprite.rb

@@ -1,24 +0,0 @@
-# frozen_string_literal: true
-
-require 'capybara/cuprite'
-
-Capybara.register_driver(:cuprite) do |app|
-  browser_options = {}.tap do |opts|
-    opts['no-sandbox'] = nil if ENV['CI']
-  end
-
-  Capybara::Cuprite::Driver.new(
-    app,
-    window_size: [1600, 1280],
-    # 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: 20,
-    # The number of seconds we'll wait for a response when communicating with browser. Default is 5
-    timeout: 20,
-    # Enable debugging capabilities
-    inspector: true,
-    # Allow running Chrome in a headful mode by setting HEADLESS env var to a falsey value
-    headless: !ENV['CUPRITE_HEADLESS'].in?(%w[n 0 no false])
-  )
-end