feat: add build github action, remove unused env vars

.github/workflows/build.yml

@@ -0,0 +1,33 @@
+name: Build
+
+on:
+  workflow_dispatch:
+  pull_request:
+    types: [opened, reopened, synchronize, ready_for_review]
+    paths:
+      - '**/*.{js,jsx,ts,tsx}'
+      - 'package*.json'
+      - '.github/workflows/build.yml'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '18'
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build
+        run: npm run build