Add the ci.yml file

.github/workflows/ci.yml

@@ -0,0 +1,29 @@
+name: CI
+
+on:
+  push:
+    branches: [ main, test-ci ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Use Node.js
+      uses: actions/setup-node@v2
+      with:
+        node-version: '14'
+
+    - name: Install dependencies
+      run: npm ci
+
+    - name: Build
+      run: npm run build
+
+    - name: Run unit tests
+      run: npm test -- tests/unit