Example GitHub Action for building with node.js

github-action-nodejs.yml

name: Build node.js

on: [push]

env:
  NODE_VERSION: '10.x'               

jobs:
  build-assets:
    runs-on: ubuntu-latest
    steps:
    
    - uses: actions/checkout@v2
    
    # Setup Node
    - name: Use Node.js ${{ env.NODE_VERSION }}
      uses: actions/setup-node@v1
      with:
        node-version: ${{ env.NODE_VERSION }}
        
    # Run npm build
    - name: npm install, build
      run: |        
        npm install
        npm run build

    # Do something with assets