Add github action

.github/workflows/ci.yaml

@@ -0,0 +1,30 @@
+name: Namefi Categorizer CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [18.x, 20.x]  # Updated Node versions
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Setup Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v3
+      with:
+        node-version: ${{ matrix.node-version }}
+        cache: 'yarn'  # Specify yarn for caching
+
+    - name: Install dependencies
+      run: yarn install  # Use yarn to install dependencies
+
+    - name: Run tests
+      run: yarn test  # Use yarn to run tests