build gh action

.github/workflows/build.yml

@@ -0,0 +1,15 @@
+name: Build
+on:
+  pull_request:
+    branches: [main]
+jobs:
+  publish:
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: '12.x'
+          registry-url: 'https://registry.npmjs.org'
+      - run: npm install
+      - run: npm run build