name: CI on: push jobs: build: name: Build & test runs-on: ubuntu-latest steps: - uses: actions/checkout@v2 # Install Node 14 - uses: actions/setup-node@v1 with: node-version: 14 # Install & build & test: - run: npm ci - run: npm test Whilst act runs build steps just like GitHub Actions does, it doesn't use the exact same base image (in part because the same image naively built locally would be 50GBopens in a new tab!). The dockerfileopens in a new tab directly runs the setup scripts from the act base image repo (in turn generated from GitHub's own setup scripts), but only runs the ones I care about: build-essentials (for native builds) and Chrome.