Add build workflow for CI/CD pipeline

.gitea/workflows/build.yml

@@ -0,0 +1,24 @@
+name: build
+
+on:
+  push:
+    paths:
+      - 'src/**'
+      - package.json
+      - package-lock.json
+      - tsconfig.json
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v6
+      - name: Set up Node.js
+        uses: actions/setup-node@v6
+        with:
+          node-version: '24'
+      - name: Install dependencies
+        run: npm ci
+      - name: Build project
+        run: npm run build