docker-compose.yml

version: '3'
services:
  db:
    image: postgres
    ports:
      - '5432:5432'
    environment:
      POSTGRES_USER: project_name
      POSTGRES_PASSWORD: project_name
      POSTGRES_DB: project_name
    volumes:
      - ./docker/postgres:/var/lib/postgres
  redis:
    image: redis:5-alpine
    ports:
      - '6379:6379'
    volumes:
      - ./docker/redis:/data
  api:
    image: 'node:13'
    user: 'node'
    working_dir: /home/node/app
    volumes:
      - ./:/home/node/app
    environment:
      NODE_ENV: development
      DBHOST: db
      DBNAME: project_name
      DBPASS: project_name
      DBUSER: project_name
      PORT: 3000
      REDIS_CONNECTION_STRING: redis://redis
      REDIS_CACHE_TIMEOUT: 300
    expose:
      - '3000'
    ports:
      - '3000:3000'
    command: 'npm run start:dev'
    depends_on:
      - db
      - redis
    links:
      - db
      - redis

The start:dev command:

"scripts": {
  "start:dev": "npx nodemon --watch 'src/**/*.ts' --ignore 'src/**/*.spec.ts' --exec 'npx ts-node' src/index.ts"
}