How to configure Wordpress to run on Docker

Well, it's not a big deal. You need two (2) things.
#1. This Nginx config

server {
    listen 80;
    server_name wp-hakase.co;
 
    root /var/www/html;
    index index.php;
 
    access_log /var/log/nginx/hakase-access.log;
    error_log /var/log/nginx/hakase-error.log;
 
    location / {
        try_files $uri $uri/ /index.php?$args;
    }
 
    location ~ \.php$ {
        try_files $uri =404;
        fastcgi_split_path_info ^(.+\.php)(/.+)$;
        fastcgi_pass wordpress:9000;
        fastcgi_index index.php;
        include fastcgi_params;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_param PATH_INFO $fastcgi_path_info;
    }
}

#2 You have to make sure your PHP instance (docker) has mysqli installed (or installing via DockerFile) everytime.

Credits: https://www.howtoforge.com/tutorial/dockerizing-wordpress-with-nginx-and-php-fpm/
https://forums.docker.com/t/status-code-500-wordpress/36581