Create ci_test.yml

.github/workflows/ci_test.yml

@@ -0,0 +1,20 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v2
+
+    - name: Install dependencies
+      run: npm install
+
+    - name: Run tests
+      run: npm test