Create nginx site with SSL using script

Nginx site example

server {
        listen 443 ssl http2;
        listen [::]:443 ssl http2;

        server_name example.site.com;

        index index.html index.htm;

        root /var/www/sites/app/production;
       
        error_log /var/log/nginx/example.site.com_error.log;
        access_log /var/log/nginx/example.site.com_access.log;


	# Include site location config with regex handler.
	include /etc/nginx/conf/site_locations.conf;

	# expires handler from nginx config.
	include /etc/nginx/conf/expires.conf;
	# CSS and Javascript
	# location ~* \.(?:css|js)$ {
	# 	expires 1y;
	# 	access_log off;
	# 	add_header Cache-Control "public";
	# }
}

server {
        listen 80;
        listen [::]:80;
        server_name example.site.com www.example.site.com;
        return 301 https://example.site.com$request_uri;
}

# Include site_maps that contains language variable mapping.
include /etc/nginx/conf/site_maps.conf;

Nginx subdomain config script

#!/bin/bash

helpFunction()
{
   echo ""
   echo "Usage: $0 -d DOMAIN -n NAME"
   echo "\t-d Root domain"
   echo "\t-n Name/subdomain"
   exit 1 # Exit script after printing help
}

while getopts ":d:n:" opt;
do
   case "$opt" in
      d ) DOMAIN="$OPTARG";;
      n ) NAME="$OPTARG";;
      ? ) helpFunction ;; # Print helpFunction in case parameter is non-existent
   esac
done

# Print helpFunction in case parameters are empty
if [ -z "$DOMAIN" ] || [ -z "$NAME" ]
then
   echo "Missing params";
   helpFunction
fi

cd /etc/nginx/sites-available/

if [ -f "$NAME.$DOMAIN" ]; then
   echo "$NAME.$DOMAIN already exists."
   exit 1 # Exit script.
fi

cp example.site.com $NAME.$DOMAIN
sed -i "s/example.site.com/$NAME.$DOMAIN/g" $NAME.$DOMAIN
cd /etc/nginx/sites-enabled/
ln -s ../sites-available/$NAME.$DOMAIN

# Handle SSL certificate.
certbot --nginx --non-interactive -d "$NAME.$DOMAIN" -d "www.$NAME.$DOMAIN";