feat: add entry point with env validation and graceful shutdown

src/index.ts

@@ -1 +1,26 @@
-console.log("Claude Telegram Bot starting...");
+import "dotenv/config";
+import { createBot } from "./bot.js";
+
+const token = process.env.TELEGRAM_BOT_TOKEN;
+const ownerId = process.env.TELEGRAM_OWNER_ID;
+const apiKey = process.env.ANTHROPIC_API_KEY;
+
+if (!token) throw new Error("TELEGRAM_BOT_TOKEN is required");
+if (!ownerId) throw new Error("TELEGRAM_OWNER_ID is required");
+if (!apiKey) throw new Error("ANTHROPIC_API_KEY is required");
+
+const bot = createBot(token, Number(ownerId));
+
+bot.start({
+  onStart: () => console.log("Bot started successfully"),
+});
+
+// Graceful shutdown
+const shutdown = () => {
+  console.log("Shutting down...");
+  bot.stop();
+  process.exit(0);
+};
+
+process.on("SIGINT", shutdown);
+process.on("SIGTERM", shutdown);