Enhance configuration and logging for user management commands

- Updated `.env.example` to include new settings for trusted proxies and networks for better security with X-Forwarded headers.
- Modified `BlockUserCommandHandler` and `UnblockUserCommandHandler` to include logging for gateway update failures, ensuring better traceability of issues during user blocking/unblocking.
- Adjusted tests for command handlers to incorporate logging functionality, improving test coverage and reliability.
- Updated frontend configuration to dynamically set the server port based on environment variables.

frontend/src/routes/admin/roles.tsx

@@ -16,13 +16,13 @@ function AdminRolesPage() {
   const queryClient = useQueryClient()
   const [editing, setEditing] = useState<RoleDto | null>(null)
 
-  const { data, isLoading, isError, refetch } = useQuery({ queryKey: ['admin-roles-page'], queryFn: listRoles })
+  const { data, isLoading, isError, refetch } = useQuery({ queryKey: ['admin-roles'], queryFn: listRoles })
 
   const deleteMutation = useMutation({
     mutationFn: deleteRole,
     onSuccess: async () => {
       toast.success(t('admin.roles.deleted'))
-      await queryClient.invalidateQueries({ queryKey: ['admin-roles-page'] })
+      await queryClient.invalidateQueries({ queryKey: ['admin-roles'] })
     },
     onError: () => toast.error(t('auth.genericError')),
   })