Php is unable to write file in docker - php

Question

I am runing a Symfony 3.4 application with docker, i need to upload a file and save it to /web/files. When i'm trying to do so i get an error:
Unable to create the "/home/docker/web/files/" directory
Note that i mounted the directory as Read-Write in cocker compose:
version: '2'
services:
front:
image: nginx
ports:
- "81:80"
links:
- "engine:engine"
- "db:db"
volumes:
- ".:/home/docker:ro"
- "./docker/front/default.conf:/etc/nginx/conf.d/default.conf:ro"
engine:
build: ./docker/engine/
volumes:
- ".:/home/docker:rw"
- "./docker/engine/php.ini:/usr/local/etc/php/conf.d/custom.ini:ro"
links:
- "db:db"
working_dir: "/home/docker"
db:
image: camptocamp/postgres:9.6
ports:
- "5433:5432"
environment:
- "POSTGRES_DB=pfe"
- "POSTGRES_PASSWORD=admin"
- "POSTGRES_USER=admin"
- "PGDATA=/var/lib/postgresql/data/pgdata"
I even created the directory files in /web, but its not working!

Answer 1

I create a separate container for my files, and just base it on an apache image. Then I use the volumes_from key to pass it into my php. Give something like this a try:
services:
apache:
build: ./build/httpd
links:
- php
ports:
- 80:80
- 443:443
volumes_from:
- app
php:
build: ./build/php
ports:
- 9000
- 9001
volumes_from:
- app
links:
- mariadb
- mail
app:
image: httpd:latest
volumes:
- ./:/var/www/html
command: "echo true"