install telegram-send
on mobile phone:
create a public channel + get the url
create a bot by talking to botfather + get the apikey (the leading number is part of the key)
make your bot a channel admin
run
# telegram-send --config ~/.config/telegram-send-MYCHANNEL.cfg --configure-channel
https://github.com/rahiel/telegram-send
https://core.telegram.org/bots/api#formatting-options
printf "huhu \U0001F4A8\n\U0001F4A7" | telegram-send --disable-web-page-preview --config ~/.config/telegram-send.conf --format markdown --stdin