title: CircleCI + Cypress configuration
body: <p>Hello I am having problem with setting up CircleCi together with Cypress. </p>
  
  <p>I included docker image with all necessarry dependencies but still it doesnt work. I tried about 40 different configs without any positive result. Please check my config and output attached in screenshots below.</p>
  
  <p><a href="https://i.stack.imgur.com/sCiEV.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/sCiEV.png" alt="enter image description here"></a></p>
  
  <pre><code>version: 2
  jobs:
    build:
      docker:
        - image: circleci/node:9.2.0
  
        - image: circleci/mongo:3.4.4
        - image: cypress/base:8
  
  working_directory: ~/repo
  
  steps:
    - checkout
  
    - restore_cache:
        keys:
        - v1-dependencies-{{ checksum "package.json" }}
        - v1-dependencies-
  
    - run: yarn install
  
    - save_cache:
        paths:
          - node_modules
        key: v1-dependencies-{{ checksum "package.json" }}
  
    - run: yarn test   // THIS COMMAND RUNS UNIT TESTS - and it is working ok
  
    - run: yarn run dev &amp; $(npm bin)/cypress run // THIS ONE IS FAILING
  </code></pre>
  
  <p>I also realised that if I remove images for node/mongo and run only e2e tests It is working. The problem occures when I try to run both - unit and e2e tests with three docker images.</p>