Update docs and rename domain suffix

The commit message should be:

``` Translate docs to French and update domain examples

Change the example domain from lab.home.arnodo.fr to taila5ad8.ts.net
and convert documentation to French. Remove LXC container configuration
that was not being used. ```

This message captures the key changes: 1. Translation of documentation
to French 2. Update of domain examples throughout the codebase 3.
Removal of unused LXC container configuration

The changes warrant a body since there are multiple related but distinct
changes being made. The message follows the Git commit style guidelines,
using imperative mood and keeping the first line under 50 characters.

terraform/prod/variables.tf

@@ -30,9 +30,9 @@ variable "admin_ssh_public_key_path" {
 }
 
 variable "domain_suffix" {
-  description = "Suffixe de domaine pour les VMs (ex: lab.home.arnodo.fr)"
+  description = "Suffixe de domaine pour les VMs (ex: taila5ad8.ts.net)"
   type        = string
-  default     = "lab.home.arnodo.fr"
+  default     = "taila5ad8.ts.net"
 }
 
 variable "default_vm_user" {