Run runner and cloud side-by-side

config.yml

version: 2.1
workflows:
  testing:
    jobs:
      - runner_mac
      - runner_linux
      - cloud_docker
jobs:
  runner_linux:
    machine: true
    resource_class: ryanpedersen/linux-runner
    steps:
      - run: echo "Hi I'm on Runners!!"
  runner_mac:
    machine: true
    resource_class: ryanpedersen/mac-runner
    steps:
      - run: echo "Hi I'm on Runners!!"
  cloud_docker:
    docker:
      - image: cimg/node:stable
    steps:
      - run: echo "Hi I'm on CircleCI-hosted runner"