drupal console errors

[magick93]

Trying to install https://github.com/acquia/headless-lightning

But get the following errors:

trying to install drupalconsole
--
  | --2018-02-14 23:17:05--  https://drupalconsole.com/installer
  | Resolving drupalconsole.com (drupalconsole.com)... 23.185.0.3, 2620:12a:8001::3, 2620:12a:8000::3
  | Connecting to drupalconsole.com (drupalconsole.com)\|23.185.0.3\|:443... connected.
  | HTTP request sent, awaiting response... 200 OK
  | Length: 721769 (705K) [application/octet-stream]
  | Saving to: '/usr/local/bin/drupal'
  | 0K .......... .......... .......... .......... ..........  7% 6.70M 0s
  | 50K .......... .......... .......... .......... .......... 14% 12.9M 0s
  | 100K .......... .......... .......... .......... .......... 21% 11.6M 0s
  | 150K .......... .......... .......... .......... .......... 28% 16.1M 0s
  | 200K .......... .......... .......... .......... .......... 35% 11.5M 0s
  | 250K .......... .......... .......... .......... .......... 42% 9.97M 0s
  | 300K .......... .......... .......... .......... .......... 49% 11.9M 0s
  | 350K .......... .......... .......... .......... .......... 56% 8.02M 0s
  | 400K .......... .......... .......... .......... .......... 63% 9.99M 0s
  | 450K .......... .......... .......... .......... .......... 70% 12.7M 0s
  | 500K .......... .......... .......... .......... .......... 78% 11.8M 0s
  | 550K .......... .......... .......... .......... .......... 85% 9.40M 0s
  | 600K .......... .......... .......... .......... .......... 92% 9.92M 0s
  | 650K .......... .......... .......... .......... .......... 99% 11.0M 0s
  | 700K ....                                                  100% 75.2M=0.07s
  | 2018-02-14 23:17:07 (10.6 MB/s) - '/usr/local/bin/drupal' saved [721769/721769]
  | [ERROR] Drupal Console is not installed at: "
  | /opt/app-root/src"
  | You must execute the following composer commands:
  | composer require drupal/console:~1.0 --prefer-dist --optimize-autoloader
  | Installing drupalconsole using composer
  | /usr/libexec/s2i/assemble: line 31: composer: command not found
  | error: build error: non-zero (13) exit code from 172.30.1.121:5000/s2i-drupal/s2i-php-drupal-container@sha256:c3581528f9db7e311b017f3a6bcd35e209701da6f15b4a4d0e9623bdd84f4919