Add test to workflow

.github/workflows/docker-image.yml

@@ -12,6 +12,24 @@ env:
 
 jobs:
 
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v3
+
+    - name: Set up NodeJS
+      uses: actions/setup-node@v1
+      with:
+        node-version: 20
+
+    - name: Install all dependencies
+      run: npm install
+
+    - name: Run Tests
+      run: npm test
+
   build:
     runs-on: ubuntu-latest