Let's Encrypt certbot command for Wildcard certficate request with CSR happening over DNS

certbot-wildcard-request.sh

#!/bin/bash

if [ $# -ne 1 ]; then
  echo "Usage: ./certbot-wildcard-request.sh <domain-name>"
  exit 1
fi

DOMAIN=$1

certbot certonly \
  -d $DOMAIN \
  -d *.$DOMAIN \
  --preferred-challenges=dns \
  --agree-tos \
  --manual \
  --server https://acme-v02.api.letsencrypt.org/directory