Cannot reach docker website on host debian - docker

Question

I try to serve an application with that docker-compose file took from
https://github.com/solidnerd/docker-bookstack/blob/master/docker-compose.yml
version: '2'
services:
mysql:
image: mysql:5.7.33
environment:
- MYSQL_ROOT_PASSWORD=secret
- MYSQL_DATABASE=bookstack
- MYSQL_USER=bookstack
- MYSQL_PASSWORD=secret
volumes:
- mysql-data:/var/lib/mysql
bookstack:
image: solidnerd/bookstack
depends_on:
- mysql
environment:
- DB_HOST=mysql:3306
- DB_DATABASE=bookstack
- DB_USERNAME=bookstack
- DB_PASSWORD=secret
volumes:
- uploads:/var/www/bookstack/public/uploads
- storage-uploads:/var/www/bookstack/storage/uploads
ports:
- "8080:8080"
# nginx:
# build: ./nginx
# depends_on:
# - bookstack
# ports:
# - "80:80"
volumes:
mysql-data:
uploads:
storage-uploads:
On Windows, if I go to localhost:8080, it works.
On Debian 10, if I try one of these commands :
curl "localhost:8080"
curl "172.17.0.1:8080"
It stucks and returns a 502 Proxy error after a while.
Here is the result of docker ps -a
45afeda13eab solidnerd/bookstack "/bin/docker-entrypo…" 27 seconds ago Up 12 seconds 80/tcp, 0.0.0.0:8080->8080/tcp, :::8080->8080/tcp app_bookstack_1
953a91c86e7d mysql "docker-entrypoint.s…" 31 seconds ago Up 9 seconds 3306/tcp app_db_1
If I uncomment my nginx configuration and use these 2 files :
events {
}
http {
server {
listen 80;
server_name localhost;
location / {
proxy_pass http://bookstack:8080;
}
}
}
FROM nginx:1.20.1
COPY nginx.conf /etc/nginx/nginx.conf
Then it works. Why ?
I would like to use that without nginx. I thought it was a problem with that application, but I had the same problem with another application. Then I guess problem comes from my Debian.
Could you advice me something to reach localhost:8080 without nginx ?