add CI

.github/workflows/nodejs.yml

@@ -0,0 +1,31 @@
+name: Node CI
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-20.04
+    timeout-minutes: 5
+
+    strategy:
+      matrix:
+        node-version: [18.x]
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v3
+      with:
+        node-version: ${{ matrix.node-version }}
+    - name: npm install, build
+      run: |
+        npm install
+        npm run build --if-present
+        npm run lint
+      env:
+        CI: true
+    - name: Run tape tests
+      run: |
+        npm run build-tests
+        xvfb-run --server-args="-screen 0 1920x1080x24" npm run test-tape-run