add gh workflow

.github/workflows/main.yml

@@ -0,0 +1,26 @@
+on: [pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    name: Mock Mirror
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - uses: oven-sh/setup-bun@v1
+        with:
+          bun-version: latest
+
+      - name: Install dependencies
+        run: bun install
+
+      - name: Lint
+        run: bun run lint
+
+      - name: Test
+        run: bun run test
+
+      - name: Build
+        run: bun run build