Docker PHP-FPM 7.3.10, Nginx, MySQL

default.conf

server {
    listen 80 default_server;
 
    server_name _;
 
    root /var/www/admin;
 
    location ~ \.php$ {
        try_files $uri =404;
        fastcgi_split_path_info ^(.+\.php)(/.+)$;
        fastcgi_pass php:9000;
        fastcgi_index index.php;
        include fastcgi_params;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_param PATH_INFO $fastcgi_path_info;
    }
 
    error_log /var/log/nginx/api_error.log;
    access_log /var/log/nginx/api_access.log;
}

docker-compose.yml

version: '3.4'

services:
    nginx:
        build:
            context: .
            target: nginx
            dockerfile: Dockerfile
        depends_on:
            - php
        ports:
            -   target: 80
                published: 8080
                protocol: tcp
        volumes:
            - .:/var/www
        working_dir: /var/www
    
    php:
        build:
            context: .
            target: php
            dockerfile: Dockerfile
        depends_on:
            - db
        volumes:
            - .:/var/www
        working_dir: /var/www
    
    db:
        image: mysql:5.7.21
        ports:
            -   target: 3306
                published: 3306
                protocol: tcp
        volumes:
            - db-data:/var/lib/mysql:rw
        environment:
            MYSQL_USER: demo
            MYSQL_PASSWORD: demo
            MYSQL_ROOT_PASSWORD: secret
            MYSQL_DATABASE: demo

volumes:
    db-data: {}

Dockerfile

FROM php:7.3.10-fpm-alpine AS PHP

# persistent / runtime deps
RUN apk add --no-cache \
    acl \
    fcgi \
    file \
    gettext \
    git \
  ;

RUN apk add --no-cache --virtual .build-deps \
    libzip-dev \
    zlib-dev \
  ; \
  \
  docker-php-ext-configure zip --with-libzip; \
  docker-php-ext-install -j$(nproc) \
    zip \
  ;

# Install Composer
COPY --from=composer:latest /usr/bin/composer /usr/bin/composer

# prevent the reinstallation of vendors at every changes in the source code
COPY composer.json composer.lock symfony.lock ./
RUN composer install

CMD ["php-fpm"]

FROM nginx:1.12.2 AS nginx

COPY default.conf /etc/nginx/conf.d/default.conf

WORKDIR /var/www