[NEW] added github actions

.github/workflows/builder.yml

@@ -0,0 +1,31 @@
+name: React App CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [20.x]
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v3
+      with:
+        node-version: ${{ matrix.node-version }}
+    - name: Install pnpm
+      run: npm install -g pnpm
+
+    - name: Install dependencies
+      run: pnpm install
+
+    - name: Build app
+      run: pnpm next build