test

Dockerfile
```
FROM node:17-alpine as development

WORKDIR /app
COPY package.json .
COPY package-lock.json .
RUN npm install
COPY . .

EXPOSE 4000

CMD ["npm", "start"]
```


config/database.config.ts

```
import { Sequelize } from 'sequelize';
import dotenv from 'dotenv';

dotenv.config();

const dbConfig = {
  host: process.env.DB_HOST || 'localhost',
  user: process.env.DB_USER || 'root',
  password: process.env.DB_PASSWORD,
  name: process.env.DB_NAME || 'transactions-exercise',
  port: process.env.DB_PORT ? parseInt(process.env.DB_PORT) : 3306
};

const sequelize = new Sequelize(dbConfig.name, dbConfig.user, dbConfig.password, {
  dialect: 'mysql',
  host: dbConfig.host,
  port: dbConfig.port
});

export default sequelize;
```

docker-compose.yml

```
version: '3'

services:
  mysqldb:
    platform: linux/amd64
    image: mysql:5.7
    restart: unless-stopped
    env_file:
      - .env
    ports:
      - 3306:3306
    volumes:
      - db:/var/lib/mysql

  app:
    container_name: transactions-client-server
    image: transactions-client-server
    tty: true
    stdin_open: true
    build:
      context: .
      target: development
    volumes:
      - .:/app/
    stdin_open: true
    env_file:
      - .env
    ports:
      - 4000:4000
    depends_on:
      - mysqldb

volumes:
  db:
```

.env

```
DB_HOST=mysqldb
DB_USER=root
DB_PASSWORD=banana
DB_NAME=transactions_database
DB_PORT=3306

MYSQL_DATABASE=transactions_database
MYSQL_ROOT_PASSWORD=banana
```