feat: add GitHub Actions workflow for build and test

Author: lawvs

.github/workflows/build.yml

@@ -0,0 +1,38 @@
+name: Build
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  build:
+    runs-on: "ubuntu-latest"
+
+    steps:
+      - name: Checkout Repo
+        uses: actions/checkout@v4
+
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v3
+
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
+
+      - name: Install node modules
+        run: pnpm install
+
+      - name: Test
+        run: pnpm run test
+
+      - name: Build
+        run: pnpm run build
+
+      # - name: Upload pages artifacts
+      #   # https://github.com/actions/upload-pages-artifact
+      #   uses: actions/upload-pages-artifact@v3
+      #   with:
+      #     path: ".next/"