buildspec.yml

# aws codebuild for React and deployment to S3
version: 0.2
phases:
  install:
    runtime-versions:
      nodejs: 10
  pre_build:
    commands:
      - echo Installing source NPM dependencies...
      - yarn
  build:
    commands:
      - echo Build started on `date`
      - yarn build
      - cd build
      - aws s3 sync . s3://${S3_BUCKET} --exclude "index.html" --exclude "*.DS_Store*" --exclude "service-worker.js" --cache-control max-age=86400 --delete
      - aws s3 cp index.html s3://${S3_BUCKET}/index.html --cache-control max-age=0,no-cache,no-store,must-revalidate
      - aws s3 cp service-worker.js s3://${S3_BUCKET}/service-worker.js --cache-control max-age=0,no-cache,no-store,must-revalidate --content-type application/javascript
      # invalidate the CloudFront cache for index.html and service-worker.js to force CloudFront to update its edge locations with the new versions
      - aws cloudfront create-invalidation --distribution-id ${CLOUDFRONT_ID} --paths /index.html /service-worker.js