UnexpectedValueException The stream or file "/var/www/storage/logs/laravel.log"

Linuxでdocker上にLaravelアプリを置き、ブラウザからアクセスしたところ

UnexpectedValueException
The stream or file "/var/www/storage/logs/laravel.log" could not be opened: failed to open stream: Permission denied

との表示がでます。
正常に表示されない理由は、何が考えられるでしょうか？

# Docker-compose.yml


version: '3'
services:
  php:
    container_name: php
    build: ./docker/php
    volumes:
      - ./server:/var/www

  nginx:
    image: nginx
    container_name: nginx
    ports:
      - 80:80
    volumes:
      - ./server:/var/www
      - ./docker/nginx/default.conf:/etc/nginx/conf.d/default.conf
    depends_on:
      - php

# php/dockerfile


FROM php:7-fpm
WORKDIR /var/www
RUN apt-get update && apt-get install -y libmcrypt-dev mysql-client && docker-php-ext-install mcrypt pdo_mysql
ADD . /var/www
RUN chown -R www-data:www-data /var/www
COPY --chown=33:33


# nginx/default.conf
server {
  listen 80;

  root  /var/www/public;
  index index.php;

  location / {
    try_files $uri $uri/ /index.php$is_args$args;
  }

  location ~ .php$ {
    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;
  }
}