http://t.me/doorman_telegram_bot - a simple anti-bot bot for Telegram groups.
You have to provide several environment variables to be able to run this bot on your own:
BOT_TOKEN=...
SECONDS_BEFORE_KICK=45
SENTRY_DSN=...
SERVER_NAME="Production" # for sentry
ENABLE_DEBUG_SENTRY_LOGGING=False
HEALTHCHECK_TOKEN=...