respond with command list when @mentioned

src/events/message.ts

@@ -0,0 +1,24 @@
+import 'dotenv/config.js';
+import { Events, Message, EmbedBuilder, User } from "discord.js";
+import { DiscordClient } from '../discordClient';
+
+module.exports = {
+  name: Events.MessageCreate,
+  async execute(client: DiscordClient, message: Message) {
+    if (message.author.bot) return;
+    if (message.mentions.has(client.user as User)) {
+      const embeds = [
+        new EmbedBuilder()
+          .setColor('#008000')
+          .setTitle('Available slash commands')
+          .setDescription(
+`/gas
+/alert [GWEI]
+/alert-delete
+/pending-alert`
+          )
+      ]
+      message.reply({embeds});
+    }
+  }
+};