ci(gitlab-ci): validate host network interfaces support

      if [ ! -z "${CI_LOCAL:-}" ] && [ ! "${CI_JOB_NAME:-}" = 'pdf' ]; then

        export MKDOCS_EXPORTER_PDF_ENABLED='false'

      fi

    # Validate network interfaces

    - |

      if [ ! -z "${CI_LOCAL:-}" ] && hostname -I | tr ' ' '\n' | grep '.' | wc -l | grep -q '^0$\|^1$'; then

        set +x

        echo ' '

        echo -n ' [INFO] Network addresses: '

        hostname -I

        echo ' '

        echo ' [ERROR] Incompatible local CI version detected or missing host network interfaces...'

        echo ' '

        exit 1

      fi

    # Prepare documentation

    - |

      if [ ! -z "${CI_LOCAL:-}" ]; then