Hi, thanks for the feedback!
Do you mean sending a single image? If so, you can find an example flow on my readme page.
I'm not very convinced of that anymore, since Telegram has build native apps for all platforms. So every user can easily use those, without all the ssl setup issues...
You are absolutely right that a web proxy does the job, but we have to be aware that Node-RED is not only made for users with a massive amount of technical skills. Would have liked to have a single-node solution for less-experienced users, but I'm afraid one or two issues will prevent me from accomplishing that. Unless somebody can give me the golden tip ...