Add basic CI github action workflow file

.github/workflows/ci.yml

@@ -0,0 +1,29 @@
+name: CI
+
+on:
+    push:
+        branches:
+            - main
+    pull_request:
+        branches:
+            - main
+
+jobs:
+    build:
+        runs-on: ubuntu-latest
+
+        steps:
+            - name: Checkout repository
+              uses: actions/checkout@v4
+
+            - name: Setup Node.js
+              uses: actions/setup-node@v3
+              with:
+                  node-version: '20'
+                  cache: 'npm'
+
+            - name: Install dependencies
+              run: npm install
+
+            - name: Run all tests
+              run: npm t