How do you construct a pipeline that deploys to staging first, and then to production only if staging succeeds?

Configure dependent jobs using the needs keyword and target environments:

jobs:
  deploy-staging:
    runs-on: ubuntu-latest
    environment: staging
    steps:
      - run: echo "Deploying to Staging..."
  deploy-prod:
    runs-on: ubuntu-latest
    needs: deploy-staging
    environment: production
    steps:
      - run: echo "Deploying to Production..."