Docker compose no connection between containers using socket

I am trying to use https://github.com/markshust/docker-magento. Following the instructions, the setup includes a nginx container in the frontend, which is suppose to connect with a php-fpm in the backend.

Containers:

ubuntu@DESKTOP-HED9HVG:/mnt/c/Users/Hezi$ docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 8db110d5737a markoshust/magento-nginx:1.18-4 "/docker-entrypoint.…" 2 hours ago Up 2 hours 80/tcp, 0.0.0.0:80->8000/tcp, 0.0.0.0:443->8443/tcp localdev_app_1 74ff9e11646a markoshust/magento-php:7.4-fpm-5 "docker-php-entrypoi…" 2 hours ago Up 2 hours 9000-9001/tcp localdev_phpfpm_1

As far as I can understand the code, the phpfpm is listening on the docker socket.

Nginx upstream:

upstream fastcgi_backend { server unix:/sock/docker.sock; }

php-fpm.conf:

: listen = /sock/docker.sock :

this is the docker-compose.yaml file

But I can't get it to work.

php-fpm is working:

app@74ff9e11646a:~/html$ ps aux USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND app 1 0.0 0.2 222828 33168 ? Ss 06:57 0:00 php-fpm: master process (/usr/local/etc/php-fpm.conf) app 6 0.0 0.0 222828 10412 ? S 06:57 0:00 php-fpm: pool www app 7 0.0 0.0 222828 10348 ? S 06:57 0:00 php-fpm: pool www app 8 0.0 0.0 222828 10348 ? S 06:57 0:00 php-fpm: pool www app 9 0.0 0.0 222828 10348 ? S 06:57 0:00 php-fpm: pool www

However,from nginx to phpfpm, there is ping, but there is no telnet:

/var/www/html # ping phpfpm PING phpfpm (172.19.0.7): 56 data bytes 64 bytes from 172.19.0.7: seq=0 ttl=64 time=0.128 m /var/www/html # telnet phpfpm 9000 telnet: can't connect to remote host (172.19.0.7): Connection refused /var/www/html # telnet phpfpm 9001 telnet: can't connect to remote host (172.19.0.7): Connection refused

I am windows10 wsl2. Any idea what I should check?

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