Dockerfile build Laravel trying to connect to Redis service yet to “up”

I am mirroring it from my StackOverflow question: https://stackoverflow.com/questions/59810019/dockerfile-build-laravel-trying-to-connect-to-redis-service-yet-to-up

My project is defined in a docker-compose file, but I'm not too familiar with docker-compose definitions.

When I try to docker-compose up -d in a fresh setup, the following error occurred during the build of a docker image.

This is after composer install, under post-autoload-dump. Laravel tries to auto discover packages (php artisan package:discover).

Generating optimized autoload files
> Illuminate\Foundation\ComposerScripts::postAutoloadDump
> @php artisan package:discover --ansi

   RedisException  : php_network_getaddresses: getaddrinfo failed: Name or service not known

  at [internal]:0
    1|

  Exception trace:

  1   ErrorException::("Redis::connect(): php_network_getaddresses: getaddrinfo failed: Name or service not known")
      /var/www/vendor/laravel/framework/src/Illuminate/Redis/Connectors/PhpRedisConnector.php:126

  2   Redis::connect("my_redis", "6379")
      /var/www/vendor/laravel/framework/src/Illuminate/Redis/Connectors/PhpRedisConnector.php:126

  Please use the argument -v to see more details.
Script @php artisan package:discover --ansi handling the post-autoload-dump event returned with error code 1
ERROR: Service 'my_app' failed to build: The command '/bin/sh -c composer global require hirak/prestissimo && composer install' returned a non-zero code: 1

The reason it cannot connect to my_redis:6379 is because my_redis is another service in the same docker-compose.yml file. So I assume the domain is not ready yet, since docker-compose wants to first build my images before hosting containers.

How can I resolve this problem? Is there a way to force Redis container to up first before building my_app? Or is there a Laravel way to prevent any domain discovery? Or is there a way to specify the building of an image depends on another service to be available?

If you want to see my docker-compose.yml:

version: '3.6'
services:

  # Redis Service
  my_redis:
    image: redis:5.0-alpine
    container_name: my_redis
    restart: unless-stopped
    tty: true
    ports:
      - "6379:6379"
    volumes:
      - ./redis/redis.conf:/usr/local/etc/redis/redis.conf
      - redisdata:/data
    networks:
      - app-network

  # Postgres Service
  my_db:
    image: postgres:12-alpine
    container_name: my_db
    restart: unless-stopped
    tty: true
    ports:
      - "5432:5432"
    environment:
      POSTGRES_DB: my
      POSTGRES_PASSWORD: admin
      SERVICE_TAGS: dev
      SERVICE_NAME: postgres
    volumes:
      - dbdata:/var/lib/postgresql
      - ./postgres/init:/docker-entrypoint-initdb.d
    networks:
      - app-network

  # PHP Service
  my_app:
    build:
      context: .
      dockerfile: Dockerfile
    image: my/php
    container_name: my_app
    restart: unless-stopped
    tty: true
    environment:
      SERVICE_NAME: my_app
      SERVICE_TAGS: dev
    working_dir: /var/www
    volumes:
      - ./:/var/www
      - /tmp:/tmp #For CS Fixer
      - ./php/local.ini:/usr/local/etc/php/conf.d/local.ini
      - fsdata:/my
    networks:
      - app-network

  # Nginx Service
  my_webserver:
    image: nginx:alpine
    container_name: my_webserver
    restart: unless-stopped
    tty: true
    ports:
      - "8080:80"
    volumes:
      - ./:/var/www
      - ./nginx/conf.d/:/etc/nginx/conf.d/
    networks:
      - app-network

# Docker Networks
networks:
  app-network:
    driver: bridge

# Volumes
volumes:
  dbdata:
    driver: local
  redisdata:
    driver: local
  fsdata:
    driver: local