build: add node ci workflow

.github/workflows/ci.yml

@@ -0,0 +1,31 @@
+name: Node.js CI
+
+on:
+  push:
+    branches: [ master ]
+    workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [12.x]
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Setup Node.js environment ${{ matrix.node-version }}
+        uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - name: Setup PNPM
+        uses: pnpm/action-setup@v2
+        with:
+          run_install: true
+
+      - name: ESLint check
+        run: pnpm lint
+
+      - name: Build
+        run: pnpm build