Add custom error pages and Nginx configuration for proxy module

- Introduced custom HTML error pages for various HTTP status codes (400, 401, 403, 404, 408, 429, 500, 502, 503, 504) in the proxy module.
- Created a .gitignore file to exclude non-HTML files in the error resources directory.
- Updated Nginx configuration to serve custom error pages for upstream errors.
- Added new Nginx configuration templates for handling HTTP and stream protocols.
- Implemented Wireguard configuration templates and associated variables for secure connections.
- Established Kubernetes resources for Stunnel and Wireguard, including deployment, service accounts, and config maps.
- Defined variables for the Stunnel and Wireguard modules to facilitate configuration.
- Created a new Wol Proxy module with Kubernetes resources for deployment and service management.

terraform/modules/apps/mail/resources/postfix/run.config

@@ -39,7 +39,7 @@ postconf -e "smtpd_sasl_type=dovecot"
 postconf -e "smtpd_sasl_path=inet:localhost:31000"
 postconf -e "smtpd_sasl_auth_enable=yes"
 postconf -e "smtpd_sasl_security_options=noanonymous"
-postconf -e "smtpd_recipient_restrictions=permit_sasl_authenticated, reject"
+postconf -e "smtpd_recipient_restrictions=permit_sasl_authenticated, reject_unauth_destination"
 postconf -e "smtpd_relay_restrictions=permit_sasl_authenticated, reject_unauth_destination"
 postconf -e "smtpd_sasl_authenticated_header=yes"
 postconf -e "smtpd_tls_wrappermode=yes"
@@ -68,7 +68,8 @@ smtps     inet  n       -       n       -       -       smtpd
   -o syslog_name=postfix/smtps
   -o smtpd_tls_wrappermode=yes
   -o smtpd_sasl_auth_enable=yes
-  -o smtpd_recipient_restrictions=permit_sasl_authenticated,reject
+  -o smtpd_recipient_restrictions=permit_sasl_authenticated,reject_unauth_destination
+  -o smtpd_relay_restrictions=permit_sasl_authenticated,reject_unauth_destination
 " | sudo tee -a /etc/postfix/master.cf
 
 /usr/sbin/postfix -c /etc/postfix start