build: added CI/CD yaml for pull-requests

Author: mfranzke

.github/workflows/pull-request.yml

@@ -0,0 +1,23 @@
+name: pull-request
+
+on:
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  build:
+    name: Build & Test
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out the source code
+        uses: actions/checkout@v2
+
+      - name: Set up NodeJS
+        uses: actions/setup-node@v1
+
+      - name: Install dependencies
+        run: npm install
+
+      - name: Run tests
+        run: npm test