I want to run an E2E test (simple string return) on a web application created with Rails.

Environment

OS: ArchLinux
Rails version: 5.2.3
Ruby version: 2.5.7p206
Docker definition
github repository

Current status

The test was executed with the following contents.

spec/support/capybara.rb

The following are Capybara settings

Capybara.register_driver: chrome_headless do | app |
  options = :: Selenium :: WebDriver :: Chrome :: Options.new
  options.add_argument ('-headless')
  options.add_argument ('-no-sandbox')
  options.add_argument ('-disable-dev-shm-usage')
  options.add_argument ('-window-size = 1400,1400')
  options.add_argument ("start-maximized")
  options.add_argument ("disable-infobars")
  options.add_argument ("-disable-extensions")
  options.add_argument ("-disable-gpu")
  Capybara :: Selenium :: Driver.new (
    app,
    browser:: chrome,
    url: "http://192.168.0.6:3000/",
    options: options
  )
end
Capybara.javascript_driver =: chrome_headless
Capybara.run_server = false
Capybara.app_host = nil

spec/features/post_page_spec.rb

The following is the test definition

require 'rails_helper'
describe 'Postpage', js: true do
  specify 'DisplayGreeting' do
    visit root_path
    expect (page) .to have_css ('p', text: 'HelloWorld')
  end
end

The following command returns an error like this
docker-compose run web bin/rspec

Error message

1. Set URL inCapybara.app_host->The error did not change.
2. Set URL inCapybara.server_host->The error did not change.
3. Manual test with Chrome browser->You can get the string HelloWorld as expected.
4. `docker-compose run web bin/rspec '