docker container run --rm -d --name php-fpm -v $(pwd)/html:/var/www/html php:7.4.27-fpm-alpine

docker container run --rm -d --name nginx --link php-fpm:my-php-fpm -p 8080:80 nginx:1.20.2-alpine

location ~ \.php$ {
    root           /var/www/html;
    fastcgi_pass   my-php-fpm:9000;
    fastcgi_index  index.php;
    fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
    include        fastcgi_params;
}

$ more docker-compose.yml 
version: "3.8"

networks:
    mynet:

services:
    php-fpm:
        image: php:7.4.27-fpm-alpine
        networks:
            - mynet
        volumes:
            - type: bind
              source: ./html
              target: /var/www/html
    nginx:
        image: nginx:1.20.2-alpine
        networks:
            - mynet
        volumes:
            - type: bind
              source: ./default.conf
              target: /etc/nginx/conf.d/default.conf
        ports:
            - 80:80