Simple CircleCI Configuration File to Build Rails 5 Project

I am working on the landing page for Budget Scape. Here is the simplest circleci/config.yml:

version: 2
jobs:
  build:
    working_directory: ~/budget
    docker:
      - image: circleci/ruby:2.4.1
        environment:
          RAILS_ENV: test
    steps:
      - checkout

      - run: sudo apt-get update && sudo apt-get install nodejs
      # Bundle install dependencies
      - run: bundle install

      # Run the tests
      - run: bundle exec rake

I am using sqlite as the production database.  The home page is a lead capture page with bullet list of benefits for a user.