Use archlinux as the default hostname (#979)

archinstall/lib/menu/selection_menu.py

@@ -458,7 +458,10 @@ class GlobalMenu(GeneralMenu):
 				lambda: ask_for_bootloader(storage['arguments'].get('advanced', False)),
 				default="systemd-bootctl" if has_uefi() else "grub-install")
 		self._menu_options['hostname'] = \
-			Selector(_('Specify hostname'), lambda: ask_hostname())
+			Selector(
+				_('Specify hostname'),
+				lambda: ask_hostname(),
+				default='archlinux')
 		self._menu_options['!root-password'] = \
 			Selector(
 				_('Set root password'),