customize and random, also some modifications on help.js

src/commands/random.js

@@ -0,0 +1,18 @@
+module.exports = function(bot, msg) {
+    const chatId = msg.chat.id;
+    const userName = msg.from.first_name;
+    const userId = msg.from.id;
+  
+    function getRandomInt(max) {
+      return Math.floor(Math.random() * max);
+    }
+  
+    const randomValue = getRandomInt(11);
+  
+    const message = `*Generated value: ${randomValue}*`;
+  
+    bot.sendMessage(chatId, message, { parse_mode: 'Markdown' })
+      .catch(error => console.error('ERROR: Message cannot be sent:', error));
+    console.log(`INFO: /random executed by ${userName}, ${userId}`);
+  }
+