first of all you need to install docker and docker compose, you can find it in docker documentation and docker compose documentation

cd ~ && git clone https://github.com/sadeghmohebbi/dockerized-wordpress-nginx-php-mariadb.git

use your own password and envs in this file (mysql/Dockerfile)

use commands below in root directory. default provided docker compose file can be used

$ docker-compose up -d --build

to see what happens:

$ docker-compose logs -f

first of all give permission to php-fpm container to write file (avoiding permission issue) according to this stackoverflow question

$ docker exec -it PHP_CONTAINER_ID /bin/bash

inside nginx docker image use this commands:

$ mkdir /var/www/html/wp-content/plugins

$ mkdir /var/www/html/wp-content/uploads

$ chown -R www-data:www-data /var/www

$ find /var/www/ -type d -exec chmod 0755 {} ;

$ find /var/www/ -type f -exec chmod 644 {} ;

and then get worpress version you want from official website or simply use commands below:

$ cd ~ && wget https://wordpress.org/latest.tar.gz && tar -xvf latest.tar.gz

$ yes | cp -r wordpress/* dockerized-wordpress-nginx-php-mariadb/public_html

use mysql as a mysql host name and wordpress as a database name, other values are based on your configuration in mysql dockerfile (step 3)