Correct text in healthcheck endpoint in Swagger UI.
Prepare image for Swagger UI.

Add image about data and access at top of Swagger UI page.

Update documentation about architecture and code about configuration and database.
Update documentation about REST API for structures and type column.
Update Excel template for structures for type column description.
Add Excel templates with demo data.

Purpose to help development and maintenance of Naming backend.
Document will give introduction to architecture and code.