To test if working (simulate):
docker-compose run --rm certbot certonly --webroot --webroot-path /var/www/certbot/ --dry-run -d example.org
To update certificate for real:
docker-compose run --rm certbot certonly --webroot --webroot-path /var/www/certbot/ -d example.org
Renew certificate
docker-compose run --rm certbot renew
Renew certificate (quiet)
docker-compose run --rm certbot renew --quiet