added file structure and docker compose to react frontend doc

# React Frontend (Stage 01) - Overview

## File Structure

```bash

.

├── docker-compose.yml

├── documentation

├── react-frontend

│   ├── Dockerfile

│   └── my-react-app

│       ├── package.json

│       ├── public

│       │   ├── favicon.ico

│       │   ├── index.html

│       │   ├── logo192.png

│       │   ├── logo512.png

│       │   ├── manifest.json

│       │   └── robots.txt

│       ├── README.md

│       └── src

│           ├── App.css

│           ├── App.js

│           ├── App.test.js

│           ├── index.css

│           ├── index.js

│           ├── logo.svg

│           ├── reportWebVitals.js

│           └── setupTests.js

├── 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

```

## Multi-container structure

```yml

# .

services:

  react-frontend:

    build:

      context: ./react-frontend

    volumes:

      - ./react-frontend/my-react-app:/app

    ports:

      - "3000:3000"

    stdin_open: true

    tty: true

    environment:

      - CHOKIDAR_USEPOLLING=true # To support live reloading on mounted volumes

    command: ["npm", "start"]

    depends_on:

      - tornado-backend

  tornado-backend:

    build: ./tornado-backend

    links:

      - postgres

    ports:

      - "8888:8888"

    command: --db_host=postgres

  postgres:

    image: postgres:10.3

    environment:

      POSTGRES_USER: blog

      POSTGRES_PASSWORD: blog

      POSTGRES_DB: blog

    ports:

      - "5432:5432"

```

## Visualization

```mermaid