add build test

.github/workflows/build.yml

@@ -0,0 +1,15 @@
+name: Build
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use Bun
+        uses: oven-sh/setup-bun@v1
+      - name: Install dependencies
+        run: bun install
+      - name: Build
+        run: bun run build