refact(config) : separate in modules

modules/local-dev.nix

@@ -0,0 +1,22 @@
+# Local developpement
+{ lib, pkgs, ... }:
+{
+  virtualisation = {
+    docker.enable = true;
+    docker.rootless = {
+      enable = true;
+      setSocketVariable = true;
+    };
+    libvirtd.enable = true;
+    lxd.enable = true;
+  };
+
+  # List packages installed in system profile. To search, run:
+  # $ nix search wget
+  environment.systemPackages = with pkgs; [
+    (import (fetchTarball https://github.com/cachix/devenv/archive/v0.6.2.tar.gz)).default
+    direnv
+    virt-manager
+    zola
+  ];
+}