docker-compose setup for Symfony application with MySQL, PHP-FPM and Nginx + extra docker-sync for osx users - for Windows users there isn't real solution yet...

docker-compose.override.yml

#
# For osx users, see http://docker-sync.io/ 
# this file should NOT be added to your VCS, only purpose of this is to override those volumes with docker-sync.yml config
#
# Also note that I'm not sure if this a correct setup - because I don't use osx - but docker-sync docs should get you the right track
#
version: '3'
services:
    php:
        volumes:
            - backend-code:/app:cached
    nginx:
        volumes:
            - backend-code:/app:cached

docker-compose.yml

version: '3'
services:
    php:
        build:
            context: .
            dockerfile: ./Dockerfile_dev
        command: php-fpm
        #environment:
            #APP_ENV=dev|test|prod
            #APP_DEBUG=1|0
            #APP_SECRET=8822e9bb81605a603006c9260793d983
            #APPLICATION_CONFIG: /app/secrets/application.json
        ports:
            - 9000:9000
        volumes:
            - ./:/app:cached

    nginx:
        build:
            context: ./docker/nginx/
        ports:
            - 8000:80
        volumes:
            - ./:/app:cached

    mysql:
        build:
            context: ./docker/mysql/
        command: --default-authentication-plugin=mysql_native_password
        restart: always
        environment:
            MYSQL_ROOT_PASSWORD: password
        ports:
            - 3310:3306
        volumes:
            - mysql:/var/lib/mysql

volumes:
    mysql:

docker-entrypoint-dev.sh

#!/bin/bash
set -e

#
# If we're starting web-server we need to do following:
#   1) Ensure that /app/var directory exists
#   2) Install all dependencies
#   3) Generate JWT encryption keys + allow webserver to read this file
#   4) Clear caches from dev and prod environments
#   5) Create database if it not exists yet
#   6) Run possible migrations, so that database is always up to date
#   7) Install public assets
#   8) Ensure that _all_ files have "correct" permissions
#
# Note that all the chmod stuff is for users who are using docker-compose within Linux environment. More info in link
# below:
#   https://jtreminio.com/blog/running-docker-containers-as-current-host-user/
#

# Step 1
mkdir -p /app/var

# Step 2
curl -sS https://getcomposer.org/installer | php
php -d memory_limit=-1 composer.phar install --ansi

# Step 3
make generate-jwt-keys
chmod 644 /app/config/jwt/private.pem

# Step 4
php /app/bin/console cache:clear

# Step 5
php /app/bin/console doctrine:database:create --if-not-exists --no-interaction

# Step 6
php /app/bin/console doctrine:migrations:migrate --no-interaction --allow-no-migration

# Step 7
php /app/bin/console assets:install --symlink --relative --no-interaction

# Step 8
chmod -R o+s+w /app

exec "$@"

docker-sync.yml

# 
# For osx users, see http://docker-sync.io/ 
# this file should be added to your VCS
#
version: '2'

syncs:
  backend-code:
    src: ./

Dockerfile_dev

FROM php:7.2.13-fpm

RUN apt-get update \
    && apt-get install -y \
        zlib1g-dev libxml2-dev \
        nano vim git unzip jq \
    && rm -rf /var/lib/apt/lists/*

RUN docker-php-ext-install -j$(nproc) \
    bcmath \
    pdo \
    pdo_mysql \
    zip

ENV COMPOSER_ALLOW_SUPERUSER 1

WORKDIR /app

ADD . .

RUN chmod +x bin/console
RUN chmod +x docker-entrypoint-dev.sh

EXPOSE 9000

ENTRYPOINT ["/app/docker-entrypoint-dev.sh"]

mysql_Dockerfile

FROM mysql:5.7

ADD mysql_custom.cnf /etc/mysql/conf.d/mysql_custom.cnf

RUN chmod 644 /etc/mysql/conf.d/mysql_custom.cnf

nginx.conf

server {
    server_name app.localhost;
    root /app/public;

    location / {
        # try to serve file directly, fallback to index.php
        try_files $uri @rewriteapp;
    }

    location @rewriteapp {
        rewrite ^(.*)$ /index.php/$1 last;
    }

    location ~* \.php(/|$) {
        fastcgi_pass php-upstream;
        fastcgi_split_path_info ^(.+\.php)(/.*)$;
        include fastcgi_params;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_param HTTPS off;
    }

    disable_symlinks off;
    fastcgi_buffer_size 256k;
    fastcgi_buffers 4 512k;
    fastcgi_busy_buffers_size 512k;

    error_log /var/log/nginx/app_error.log;
    access_log /var/log/nginx/app_access.log;
}

nginx_Dockerfile

FROM nginx:latest

ADD nginx.conf /etc/nginx/conf.d/default.conf
ADD php-upstream.conf /etc/nginx/conf.d/upstream.conf

RUN usermod -u 1000 www-data

php-upstream.conf

upstream php-upstream {
    server php:9000;
}