title: Gitlab CI - docker: command not found
body: <p>I am trying to build my docker image within the gitlab ci pipeline.</p>
  
  <p>However it is not able to find the docker command.</p>
  
  <blockquote>
    <p>/bin/bash: line 69: docker: command not found ERROR: Job failed: error
    executing remote command: command terminated with non-zero exit code:
    Error executing in Docker Container: 1</p>
  </blockquote>
  
  <p><strong>.gitlab-ci.yml</strong></p>
  
  <pre><code>stages:
    - quality
    - test
    - build
    - deploy
  
  image: node:8.11.3
  
  services:
    - mongo
    - docker:dind
  
  before_script:
  - npm install
  
  quality:
    stage: quality
    script:
    - npm run-script lint
  
  test:
    stage: test
    script:
    - npm run-script test
  
  build:
    stage: build
    script:
    - docker build -t server .
  
  deploy:
    stage: deploy
    script:
    - echo "TODO deploy push docker image"
  </code></pre>