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/dovecot.tf

@@ -59,7 +59,7 @@ resource "kubernetes_deployment" "dovecot" {
       }
     }
     strategy {
-      type = "RollingUpdate"
+      type = var.dovecot_use_host_networking ? "Recreate" : "RollingUpdate"
     }
     template {
       metadata {
@@ -81,6 +81,7 @@ resource "kubernetes_deployment" "dovecot" {
           image = "dovecot/dovecot:${var.dovecot_tag}"
           port {
             container_port = 31993
+            host_port      = var.dovecot_use_host_networking ? 993 : null
           }
           port {
             name           = "lmtp"
@@ -118,6 +119,19 @@ resource "kubernetes_deployment" "dovecot" {
             mount_path = "/etc/mail-crypt"
             read_only  = true
           }
+          volume_mount {
+            name       = "dovecot-logs"
+            mount_path = "/var/log/dovecot"
+            read_only  = false
+          }
+          volume_mount {
+            name       = "tmp"
+            mount_path = "/tmp"
+          }
+          volume_mount {
+            name       = "dovecot-run"
+            mount_path = "/var/run/dovecot"
+          }
         }
         container {
           name  = "stunnel"
@@ -194,6 +208,20 @@ resource "kubernetes_deployment" "dovecot" {
             }
           }
         }
+        volume {
+          name = "dovecot-logs"
+          host_path {
+            path = "/var/log/dovecot"
+          }
+        }
+        volume {
+          name = "tmp"
+          empty_dir {}
+        }
+        volume {
+          name = "dovecot-run"
+          empty_dir {}
+        }
       }
     }
   }
@@ -245,8 +273,7 @@ resource "kubernetes_service" "dovecot_lmtp" {
       port        = 31024
       target_port = 31024
     }
-    type       = "ClusterIP"
-    cluster_ip = "None"
+    type = "ClusterIP"
   }
 }
 
@@ -265,7 +292,6 @@ resource "kubernetes_service" "dovecot_auth" {
       port        = 31000
       target_port = 31000
     }
-    type       = "ClusterIP"
-    cluster_ip = "None"
+    type = "ClusterIP"
   }
 }