Bootstrap CircleCI Setup with Docker 🐳

CircleCI maintains a collection of Docker containers, pre-installed with different languages and tools.

These include language image variants that can eliminate a lot of CI setup churn. I recently used the -browsers variant, which ships with Chrome, Firefox, Java 8, and Geckodriver.

Here's how you could use such a container.

# .config/circle.yml

version: 2
jobs:
  build:
    docker:
      - image: circleci/ruby:2.5.1-browsers
    steps:
      - run: rake

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