Set up/renew Let's Encrypt certificate using certbot

certbot-setup.sh

#!/bin/bash
for ARGUMENT in "$@"
do
    KEY=$(echo $ARGUMENT | cut -f1 -d=)
    VALUE=$(echo $ARGUMENT | cut -f2 -d=)

    case "$KEY" in
            --domain)                domain="${VALUE}" ;;
            --wildcard)              wildcard="true" ;;
            --help)                  help="true" ;;
            *)
    esac
done

if [ -n "$help" ]; then
        echo "USAGE: certbot-setup --domain=DOMAIN.COM [--wildcard] [--help]"
elif [ -n "$domain" ]; then
        if [ -n "$wildcard" ]; then
                sudo certbot certonly --config /etc/letsencrypt/config.ini --agree-tos -d "*.$domain" -d $domain --manual-public-ip-logging-ok --preferred-challenges dns-01 --server https://acme-v02.api.letsencrypt.org/directory
        else
                sudo certbot certonly --config /etc/letsencrypt/config.ini --agree-tos -d $domain --manual-public-ip-logging-ok --preferred-challenges dns-01 --server https://acme-v02.api.letsencrypt.org/directory
        fi
else
        echo "ERROR: missing domain - please enter it as domain=YOURDOMAINHERE"
fi