docs: add docs for git-from-directory trigger
docs: add docs for git-from-directory trigger

claytonbrown/dokku,dokku/dokku,claytonbrown/dokku,progrium/dokku,claytonbrown/dokku,claytonbrown/dokku,progrium/dokku,dokku/dokku,claytonbrown/dokku,dokku/dokku,dokku/dokku,dokku/dokku,progrium/dokku,progrium/dokku,progrium/dokku,claytonbrown/dokku,progrium/dokku,dokku/dokku,progrium/dokku,claytonbrown/dokku,claytonbrown/dokku,dokku/dokku,progrium/dokku,dokku/dokku