feat: Add Express server with crawl endpoint

backend/functions/src/server.ts

@@ -23,3 +23,28 @@ app.listen(port, () => {
 });
 
 export default app;
+import express from 'express';
+import { container } from 'tsyringe';
+import { CrawlerHost } from './cloud-functions/crawler';
+
+const app = express();
+const port = process.env.PORT || 3000;
+
+const crawlerHost = container.resolve(CrawlerHost);
+
+app.use(express.json());
+
+app.post('/crawl', async (req, res) => {
+  try {
+    await crawlerHost.crawl(req, res);
+  } catch (error) {
+    console.error('Error during crawl:', error);
+    res.status(500).json({ error: 'An error occurred during the crawl' });
+  }
+});
+
+app.listen(port, () => {
+  console.log(`Server is running on port ${port}`);
+});
+
+export default app;

package.json

@@ -4,12 +4,19 @@
     "description": "### Prerequisite - Node v18 (The build fails for Node version >18) - Yarn - Firebase CLI (`npm install -g firebase-tools`)",
     "main": "index.js",
     "scripts": {
-        "test": "echo \"Error: no test specified\" && exit 1"
+        "test": "echo \"Error: no test specified\" && exit 1",
+        "start": "ts-node src/server.ts"
     },
     "author": "",
     "license": "ISC",
     "devDependencies": {
         "firebase-tools": "^12.4.2",
-        "typescript": "^5.1.6"
+        "typescript": "^5.1.6",
+        "@types/express": "^4.17.17",
+        "ts-node": "^10.9.1"
+    },
+    "dependencies": {
+        "express": "^4.17.1",
+        "tsyringe": "^4.7.0"
     }
-}
+}