I need a Telegram bot that immediately greets new users and then stays available for ongoing, menu-style interaction. When someone starts or joins the chat the bot should detect the event, send a personalized welcome message, and present them with simple buttons (e.g., “About”, “Help”, “Contact”) that trigger predefined replies. Under the hood, please use the official Telegram Bot API together with whichever stack you prefer—Python (aiogram, python-telegram-bot) or Node.js (telegraf) are both fine—as long as the code is clean, well-commented, and easy for me to deploy on my own server. Core requirements • Instant welcome message for every /start or new-member join event • Interactive buttons or slash-commands that return canned information • Simple configuration file where I can edit the greeting text and responses • Clear README with setup steps and any environment variables Because I need this ASAP, aim for a quick first demo I can test, then we’ll polish copy or button labels if needed before final hand-off.