fix(Nextcloud): Add variable to configure SMTP

nextcloud/docker-compose.smtp.yml

@@ -4,14 +4,14 @@ services:
   nextcloud-fpm:
     environment:
       &smtp-configuration
-      SMTP_HOST: ${NC_mail_smtphost:?err}
-      SMTP_SECURE: ${NC_mail_smtpsecure:-ssl}
+      SMTP_HOST: ${SMTP_HOST:?err}
+      SMTP_SECURE: ${SMTP_SECURE:-ssl}
       SMTP_PORT: ${SMTP_PORT:-465}
-      SMTP_AUTHTYPE: ${NC_mail_smtpauthtype:-LOGIN}
-      SMTP_NAME: ${NC_mail_smtpname:?err}
-      SMTP_PASSWORD: ${NC_mail_smtppassword:?err}
-      MAIL_FROM_ADDRESS: ${NC_mail_from_address:?err}
-      MAIL_DOMAIN: ${NC_mail_domain:?err}
+      SMTP_AUTHTYPE: ${SMTP_AUTHTYPE:-LOGIN}
+      SMTP_NAME: ${SMTP_NAME:?err}
+      SMTP_PASSWORD: ${SMTP_PASSWORD:?err}
+      MAIL_FROM_ADDRESS: ${MAIL_FROM_ADDRESS:?err}
+      MAIL_DOMAIN: ${MAIL_DOMAIN:?err}
 
   nextcloud-cron:
     environment: