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/apps/prod-01/apps.tf

@@ -54,6 +54,10 @@ module "mail" {
   mail_crypt_public_key  = var.mail_crypt_public_key
 
   ca_pem = var.root_ca_pem
+
+  # For now we need to use host networking because of the fail2ban integration
+  postfix_use_host_networking = true
+  dovecot_use_host_networking = true
 }
 
 module "gitea" {
@@ -116,11 +120,18 @@ module "ssh_locker_web" {
   socket_path       = "/var/run/ssh_locker/provision.sock"
 }
 
-module "reverse_proxy" {
-  source = "../../modules/apps/nginx-reverse-proxy"
+module "proxy" {
+  source = "../../modules/utils/proxy"
 
-  services         = local.reverse_proxy_services
-  wireguard_config = local.reverse_proxy_wireguard_config
   auth_token       = var.nginx_token_bearer
+  services         = local.proxy_services
   streams          = local.streams
+  wireguard_config = local.wireguard_config
+}
+
+module "prometheus" {
+  source = "../../modules/utils/prometheus"
+
+  persistent_folder = "${local.persistent_folder}/monitoring"
+  config            = file("${path.module}/resources/prometheus.yml")
 }