permission with volume docker and wordpress - wordpress

Question

I've created a docker-composer.yml file to run a container for wordpress mysql and phpmyadmin. It starts well bt i have a permission problem. All my files have www-data:www-data for user and group and when i want to create a new theme in wp-content i have a permission denied. Im in ubuntu 18.04.
here is my docker-compose.yml file :
version: '3'
services:
# Database
db:
image: mysql:5.7
volumes:
- db_data:/var/lib/mysql
restart: always
environment:
MYSQL_ROOT_PASSWORD: password
MYSQL_DATABASE: wordpress
MYSQL_USER: wordpress
MYSQL_PASSWORD: wordpress
networks:
- wpsite
# phpmyadmin
phpmyadmin:
depends_on:
- db
image: phpmyadmin/phpmyadmin
restart: always
ports:
- '8080:80'
environment:
PMA_HOST: db
MYSQL_ROOT_PASSWORD: password
networks:
- wpsite
# Wordpress
wordpress:
depends_on:
- db
image: wordpress:latest
ports:
- '8000:80'
restart: always
volumes: ['./:/var/www/html']
environment:
WORDPRESS_DB_HOST: db:3306
WORDPRESS_DB_USER: wordpress
WORDPRESS_DB_PASSWORD: wordpress
networks:
- wpsite
networks:
wpsite:
volumes:
db_data:
i tried to change to "chown -Rf myname:myname ." so there i can create a file but upload for files in wordpress doesn't work now. So i wonder how to set properly permissons with a docker mounted volume in ubuntu.

Answer 1

I just add user: 1000:1000 to container, and everything works fine. Got idea from this tutorial

Answer 2

One solution for this would be to add your own user myname to the www-data group
sudo usermod -aG www-data myname
and make sure the www-data group has write privileges on all files/directories and execute privileges on directories.
Another solution would be to let your own user own all files (myname:www-data as owner) and directories and make sure www-data group has appropriate read/write privileges so the WordPress container's webserver can use the group privileges to read/write files.
Off-topic: also make sure to have a
define('FS_METHOD', 'direct');
line in your wp-config.php.