add pipeline workflow and some steps

.github/workflows/pipeline.yml

@@ -0,0 +1,24 @@
+name: Deployment pipeline
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  simple_deployment_pipeline:
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+      #   - uses: superfly/flyctl-actions/setup-flyctl@master
+      - name: Install dependencies
+        run: npm ci
+      - name: Check style
+        run: npm run lint
+      - name: Build
+        run: npm run build
+      - name: Test
+        run: npm run test