title: Configure .yml to execute multiple commands
body: <p>Hello i have simple configuration in my project:</p>
  
  <pre><code>version: 2
  jobs:
      build:
          docker:
              - image: circleci/node:7
          steps:
              - checkout
              - run:
                  name: install-dependencies
                  command: npm install
              - run:
                  name: tests
                  command: npm test
              - deploy:
                  name: digital-ocean
                  command: ssh -o "StrictHostKeyChecking no" user@hostname "cd ~/profile-store; git pull; npm install; forever start app.js"
  </code></pre>
  
  <p>The problem is it need multiply command:</p>
  
  <ul>
  <li>cd client</li>
  <li>npm start</li>
  <li>cd ..</li>
  </ul>
  
  <p>(in second iteration should install packages from server and in the next run unit tests in client)</p>
  
  <p>I tried these syntax:</p>
  
  <ul>
  <li>command: ["cd client", "npm install", "cd .."]</li>
  </ul>
  
  <p>But getting an error. The question is :</p>
  
  <p><strong>How can i write to execute 3 commands in one command instruction?</strong></p>