Use Certbot in Docker to do some ACME tasks quickly.

certbot.sh

#!/usr/bin/env bash
# Please fill you real email

docker run --rm -it \
    -v "./token/cloudflare.ini:/workdir/token/cloudflare.ini" \
    -v "/etc/letsencrypt:/etc/letsencrypt" \
    -v "/var/lib/letsencrypt:/var/lib/letsencrypt" \
    certbot/dns-cloudflare \
    --server https://acme-v02.api.letsencrypt.org/directory \
    --dns-cloudflare \
    --email [email protected] \
    --dns-cloudflare-credentials /workdir/token/cloudflare.ini \
    --dns-cloudflare-propagation-seconds 8 \
    "$@"