CircleCI: Build static site with Hugo, Upload to S3

config.yml

defaults: &defaults
  working_directory: ~/work
  docker:
    - image: ubuntu:16.04

version: 2
jobs:
  build:
    <<: *defaults
    steps:
      - run:
          name: APT update
          command: apt update
      - run:
          name: Install curl
          command: apt install -y curl
      - run:
          name: Install git
          command: apt install -y git
      - checkout
      - run: git submodule update --init
      - run:
          name: Download Hugo
          command: curl -LO 'https://github.com/gohugoio/hugo/releases/download/v0.36/hugo_0.36_Linux-64bit.deb'
      - run:
          name: Install Hugo
          command: dpkg -i hugo_0.36_Linux-64bit.deb
      - run:
          name: Build Website
          command: hugo
      - persist_to_workspace:
          root: .
          paths:
            - public
  deploy:
    <<: *defaults
    steps:
      - run:
          name: APT update
          command: apt update
      - run:
          name: Install ca-certificates for attach_workspace
          command: apt install -y ca-certificates
      - run:
          name: Install pip3
          command: apt install -y python3-pip
      - run:
          name: Install AWS CLI
          command: pip3 install awscli
      - attach_workspace:
          at: .
      - run:
          name: Deploy to S3
          command: aws s3 sync --exact-timestamps public/ s3://${S3_BUCKET_NAME}/ --delete
      - run:
          name: Invalidate CloudFront cache
          command: aws cloudfront create-invalidation --distribution-id ${CLOUDFRONT_DISTRIBUTION_ID} --paths '/*'
workflows:
  version: 2
  build_and_deploy:
    jobs:
      - build
      - deploy:
          requires:
            - build
          filters:
            branches:
              only: master