Merge pull request 'Added optional feature-flag files' (#177) from internal/feature-flags into 0.3.1

Reviewed-on: sh-edraft.de/kd_discord_bot#177
Reviewed-by: Ebola-Chan <nick.jungmann@gmail.com>
Reviewed-by: edraft-dev <dev.sven.heidemann@sh-edraft.de>

kdb-bot/src/bot/startup_settings_extension.py

@@ -31,6 +31,8 @@ class StartupSettingsExtension(StartupExtensionABC):
         configuration.add_json_file(f'config/appsettings.{environment.host_name}.json', optional=True)
         # load feature-flags
         configuration.add_json_file(f'config/feature-flags.json', optional=False)
+        configuration.add_json_file(f'config/feature-flags.{environment.environment_name}.json', optional=True)
+        configuration.add_json_file(f'config/feature-flags.{environment.host_name}.json', optional=True)
 
         configuration.add_configuration('Startup_StartTime', str(self._start_time))
         self._configure_settings_with_sub_settings(configuration, BotSettings, lambda x: x.servers, lambda x: x.id)