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/postfix.tf

@@ -36,7 +36,7 @@ resource "kubernetes_deployment" "postfix" {
       }
     }
     strategy {
-      type = "RollingUpdate"
+      type = "Recreate"
     }
     template {
       metadata {
@@ -56,6 +56,7 @@ resource "kubernetes_deployment" "postfix" {
           image = "tozd/postfix:${var.postfix_tag}"
           port {
             container_port = 465
+            host_port      = var.postfix_use_host_networking ? 465 : null
           }
           dynamic "env" {
             for_each = local.postfix_env_vars
@@ -189,8 +190,7 @@ resource "kubernetes_service" "postfix" {
       target_port = 465
     }
 
-    type       = "ClusterIP"
-    cluster_ip = "None"
+    type = "ClusterIP"
   }
 
   lifecycle {