added file structure to tornado bakend stage 1 doc

## Web App Architecture

### File structure

```bash

.

├── documentation

├── README.md

└── tornado-backend

    ├── blog.py

    ├── docker-compose.yml

    ├── Dockerfile

    ├── README.md

    ├── requirements.txt

    ├── schema.sql

    ├── static

    │   └── blog.css

    └── templates

        ├── archive.html

        ├── base.html

        ├── compose.html

        ├── create_author.html

        ├── entry.html

        ├── feed.xml

        ├── home.html

        ├── login.html

        └── modules

            └── entry.html

```

### Docker compose file

```yml