nginx.conf

# ./nginx.conf
server {
        listen 80;
        listen [::]:80;

        # такая конструкция позволяет обращаться по любому доменному имени
        server_name _;

        index index.php index.html index.htm;

        # корневая директория нашего сайта. Взаимосвязь - ищи в Dockerfile
        root /var/www/html/wordpress;

        location ~ /.well-known/acme-challenge {
                allow all;
                root /var/www/html;
        }

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

        # fastcgi_pass php:9000; - for php image
        # fastcgi_pass wordpress:9000; - for wordpress image
        location ~ \.php$ {
                try_files $uri =404;
                fastcgi_split_path_info ^(.+\.php)(/.+)$;
                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;
        }

        location ~ /\.ht {
                deny all;
        }

        location = /favicon.ico {
                log_not_found off; access_log off;
        }
        location = /robots.txt {
                log_not_found off; access_log off; allow all;
        }
        location ~* \.(css|gif|ico|jpeg|jpg|js|png)$ {
                expires max;
                log_not_found off;
        }
}