CI build

workflows/ci.yml

@@ -0,0 +1,18 @@
+name: Continuous integration
+
+on: [pull_request, push]
+
+jobs:
+  check_pr:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+
+    - name: "npm ci"
+      run: npm ci
+
+    - name: "npm run build"
+      run: npm run build
+
+    - name: "npm run test"
+      run: npm run test