feat: always overwrite the dokku.conf file for nginx
feat: always overwrite the dokku.conf file for nginx

This is necessary as sometimes older config is shipped with Dokku, meaning that security directives - amongst others - are not properly updated.

Refs #3342

jimjag/dokku,alexquick/dokku,claytonbrown/dokku,progrium/dokku,jimjag/dokku,progrium/dokku,progrium/dokku,claytonbrown/dokku,alexquick/dokku,claytonbrown/dokku,claytonbrown/dokku,jimjag/dokku,alexquick/dokku,jimjag/dokku,dokku/dokku,dokku/dokku,claytonbrown/dokku,progrium/dokku,alexquick/dokku,jimjag/dokku,claytonbrown/dokku,progrium/dokku,jimjag/dokku,alexquick/dokku,progrium/dokku,jimjag/dokku,alexquick/dokku,dokku/dokku,progrium/dokku,dokku/dokku,dokku/dokku,progrium/dokku,jimjag/dokku,dokku/dokku,dokku/dokku,alexquick/dokku,claytonbrown/dokku,dokku/dokku,alexquick/dokku,claytonbrown/dokku