This is a customized version of the s3-sync-action that uses the vanilla AWS CLI to sync a directory (either from your repository or generated during your workflow) with a remote S3 bucket. It also runs the command: yarn run build to build the docusaurs site for deployment.

Place in a .yml file such as this one in your .github/workflows folder. Refer to the documentation on workflow YAML syntax here.

name: CI
on: [push]

jobs:
  deploy:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@master
      - uses: brockneedscoffee/s3-docusaurus-sync-action@master
        env:
          AWS_DEFAULT_REGION: "us-east-1"
          AWS_S3_BUCKET: ${{ secrets.AWS_S3_BUCKET }}
          AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
          AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}

The following settings must be passed as environment variables as shown in the example. Sensitive information, especially AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY, should be set as encrypted secrets — otherwise, they'll be public to anyone browsing your repository's source code and CI logs.