Refactor bot token retrieval to use Deno.env and improve error handling

src/bot.ts

@@ -1,15 +1,12 @@
 import { createBot, Intents, startBot } from "npm:discordeno@18.0.1";
-import * as dotenv from "jsr:@std/dotenv";
 import { messagehandler } from "./messages.ts";
 
-const env = dotenv.loadSync();
-
-if (typeof env.BOT_TOKEN !== "string") {
-  throw new Error("Bot token is required in .env file");
+const BOT_TOKEN = Deno.env.get("BOT_TOKEN") ?? "";
+if (!BOT_TOKEN) {
+  throw new Error("BOT_TOKEN is missing!");
 }
-
 const bot = createBot({
-  token: env.BOT_TOKEN,
+  token: BOT_TOKEN,
   intents: Intents.Guilds | Intents.GuildMessages | Intents.MessageContent |
     Intents.DirectMessages,
   events: {