$ headless-seo-check http://127.0.0.1:4399 -a --no-color
--- stdout+stderr ---
headless-seo-check: checking http://127.0.0.1:4399 …
headless-seo-check: cannot reach 127.0.0.1:4399: connection refused (nothing listening on that port) (ECONNREFUSED)
headless-seo-check:   robots.txt could not be read — connection refused (nothing listening on that port) (ECONNREFUSED)
headless-seo-check:   http://127.0.0.1:4399/sitemap.xml — connection refused (nothing listening on that port) (ECONNREFUSED)
headless-seo-check:   http://127.0.0.1:4399/sitemap_index.xml — connection refused (nothing listening on that port) (ECONNREFUSED)
headless-seo-check http://127.0.0.1:4399

  CANNOT RUN  cannot reach 127.0.0.1:4399: connection refused (nothing listening on that port) (ECONNREFUSED)
              robots.txt could not be read — connection refused (nothing listening on that port) (ECONNREFUSED)
              http://127.0.0.1:4399/sitemap.xml — connection refused (nothing listening on that port) (ECONNREFUSED)
              http://127.0.0.1:4399/sitemap_index.xml — connection refused (nothing listening on that port) (ECONNREFUSED)

  Nothing was checked, so this is not a passing result. Exit code 2.
--- exit code: 2 ---