Add Gitea workflow file for CI

Co-authored-by: openhands <openhands@all-hands.dev>

.gitea/workflows/build.yml

@@ -0,0 +1,26 @@
+# Gitea CI/CD Workflow File (Inspired by .github/workflows/build.yml)
+# This workflow triggers on push or pull request to main/master branches.
+
+workflow_name: Build Project
+on:
+  push:
+    - branches: [main, master]
+  pull_request:
+    - branches: [main, master]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest # Or the recommended runner for Gitea
+    steps:
+      - uses: actions/checkout@v4 # Assuming compatible action or manual checkout step
+        with:
+          fetch-depth: 0
+      - name: Setup Node.js
+        uses: actions/setup-node@v4 # Or equivalent setup step for Gitea runner
+        with:
+          node-version: 24
+          cache: npm
+      - name: Install dependencies
+        run: npm ci
+      - name: Build project
+        run: npm run build