Add docker-compose certbot configurations with backward compatibility (#6702)

Co-authored-by: Your Name <you@example.com>

docker/certbot/update-cert.template.txt

@@ -0,0 +1,19 @@
+#!/bin/bash
+set -e
+
+DOMAIN="${CERTBOT_DOMAIN}"
+EMAIL="${CERTBOT_EMAIL}"
+OPTIONS="${CERTBOT_OPTIONS}"
+CERT_NAME="${DOMAIN}" # 証明書名をドメイン名と同じにする
+
+# Check if the certificate already exists
+if [ -f "/etc/letsencrypt/renewal/${CERT_NAME}.conf" ]; then
+  echo "Certificate exists. Attempting to renew..."
+  certbot renew --noninteractive --cert-name ${CERT_NAME} --webroot --webroot-path=/var/www/html --email ${EMAIL} --agree-tos --no-eff-email ${OPTIONS}
+else
+  echo "Certificate does not exist. Obtaining a new certificate..."
+  certbot certonly --noninteractive --webroot --webroot-path=/var/www/html --email ${EMAIL} --agree-tos --no-eff-email -d ${DOMAIN} ${OPTIONS}
+fi
+echo "Certificate operation successful"
+# Note: Nginx reload should be handled outside this container
+echo "Please ensure to reload Nginx to apply any certificate changes."