I want to create imagination bot, I have Base url "" when user /start bot then show welcome message, after show /image send by user so tell to user now send your propmt I will generate... Send keybord buttons also with Cancle buttons. Use professional message even use bold text and emoji for evryone. 

Give me each one command with each one BJS. When user send /start then show only start welcome message only. When user send /image then show description that enter your propmt, and got error telegram api error_code:400, bad request: can't parse entities. Can't find starting bytes offten 40.