Docker for Developers: Containers, Images and Compose

Docker for Developers

Docker packages applications with all dependencies into containers — eliminating "works on my machine" problems. Every modern development workflow uses Docker.

FROM php:8.3-fpm-alpine
RUN apk add --no-cache nginx git
RUN docker-php-ext-install pdo pdo_mysql opcache
COPY --from=composer:2 /usr/bin/composer /usr/bin/composer
WORKDIR /var/www/html
COPY composer.json composer.lock ./
RUN composer install --no-dev --optimize-autoloader
COPY . .
RUN chown -R www-data:www-data storage
EXPOSE 9000
CMD ["php-fpm"]

docker-compose.yml

version: '3.9'
services:
  app:
    build: .
    volumes:
      - .:/var/www/html
    environment:
      DB_HOST: mysql
    depends_on:
      - mysql

  mysql:
    image: mysql:8.0
    environment:
      MYSQL_DATABASE:      ezycoders
      MYSQL_ROOT_PASSWORD: secret
    volumes:
      - mysql_data:/var/lib/mysql

  redis:
    image: redis:7-alpine

volumes:
  mysql_data:

docker build -t myapp:1.0 .
docker run -p 8080:80 myapp:1.0
docker ps                              # running containers
docker exec -it container_name bash   # shell into container

docker-compose up -d                  # start all services
docker-compose logs -f app            # follow logs
docker-compose exec app php artisan migrate