Configuring laravel project with docker nginx error

i'm trying to set up a laravel project with mysql, phpmyadmin on docker. All the configurations seem to be good since docker-compse up starts all. But when i try to acces to the default page i go that error on the log :

webserver     | 2020/02/03 09:02:36 [crit] 6#6: *4 stat() "/var/www/public/" failed (13: Permission denied), client: 172.18.0.1, server: , request: "GET / HTTP/1.1", host: "localhost"
webserver     | 2020/02/03 09:02:36 [crit] 6#6: *4 stat() "/var/www/public/" failed (13: Permission denied), client: 172.18.0.1, server: , request: "GET / HTTP/1.1", host: "localhost"
webserver     | 2020/02/03 09:02:36 [crit] 6#6: *4 stat() "/var/www/public/index.php" failed (13: Permission denied), client: 172.18.0.1, server: , request: "GET / HTTP/1.1", host: "localhost"

My dockerfile contains that:

# Add user for laravel application
RUN groupadd -g 1000 www
RUN useradd -u 1000 -ms /bin/bash -g www www
# Copy existing application directory contents
COPY . /var/www
# Copy existing application directory permissions
COPY --chown=www:www . /var/www
# Change current user to www
USER www

and ls -la in the containers returns:

drwx------  2 www  www    4096 Oct 18 20:10 config
drwx------  5 www  www    4096 Oct 18 20:10 database
-rw-rw-r--  1 www  www    1358 Feb  3 08:48 docker-compose.yml
drwx------  2 www  www    4096 Oct 18 20:10 mysql
drwx------  3 www  www    4096 Oct 18 20:10 nginx
-rw-rw-r--  1 www  www    1125 Oct 18 20:10 package.json
drwx------  2 www  www    4096 Oct 18 20:10 php
-rw-rw-r--  1 www  www    1156 Oct 18 20:10 phpunit.xml
drwxrwxrwx  4 www  www    4096 Oct 18 20:10 public
drwx------  6 www  www    4096 Oct 18 20:10 resources
drwx------  2 www  www    4096 Oct 18 20:10 routes
-rw-rw-r--  1 www  www     563 Oct 18 20:10 server.php

I don't know what's wrong. i found this Permission Denied Error using Laravel & Docker but i doesn't works.