Disable the sudo lecture

- As sudo won't remember us between boots, if we don't do this we'll see the
  sudo lecture every time we restart our computer
diff --git a/modules/sudo.nix b/modules/sudo.nix
new file mode 100644
index 0000000..0fee468
--- /dev/null
+++ b/modules/sudo.nix
@@ -0,0 +1,5 @@
+{
+  config.security.sudo.extraConfig = ''
+    Defaults lecture = never
+  '';
+}