Improving Document Structure

The Document is the first part of the Tacker application that a user interested in Tacker will see, but it does not currently provide a clear understanding of the structure of Tacker and what it can do at a glance. Due to Tacker's development history, API versions and functional parts such as Legacy/v1/v2, and NFVO/VNFM coexist, and thus it is difficult to understand the whole architecture without prior knowledge. In addition, there are some tutorials that do not work, making it difficult for beginners to use Tacker.