feat(bot): add NodeJS implementation and deploy script

src/commands/ping.js

@@ -0,0 +1,15 @@
+const { SlashCommandBuilder } = require('discord.js');
+
+module.exports = {
+    data: new SlashCommandBuilder()
+        .setName('ping')
+        .setDescription('Replies with Pong!'),
+    async execute(interaction) {
+        // Calculate latency (optional but common for ping commands)
+        const sent = await interaction.reply({ content: 'Pinging...', fetchReply: true, ephemeral: true });
+        const latency = sent.createdTimestamp - interaction.createdTimestamp;
+        const wsPing = interaction.client.ws.ping; // WebSocket heartbeat ping
+
+        await interaction.editReply(`Pong! 🏓\nRoundtrip latency: ${latency}ms\nWebSocket Ping: ${wsPing}ms`);
+    },
+};