Nextcloud + nginx docker isnt working

Hello,

I have issues with my docker configuration.
MariaDB and Nextcloud are working will.
But nginx isnt working as expected.

My docker-compose.yaml looks like:
version: ‘3.3’
services:
mariadb:
image: mariadb

        nextcloud:
                image: nextcloud
                volumes:
                       - type: bind
                         source : /var/lib/docker_data/nextcloud/data
                         target : /var/www/html/data
                       - type: bind
                         source : /var/lib/docker_data/nextcloud/config
                         target : /var/www/html/config
                networks:
                       - nextcloud
                restart: always
                ports:
                       - "8080:80"
                       - "443:443"
                container_name : nextcloud-nextcloud
                depends_on:
                        - mariadb


        nginx:
                image: nginx
                volumes:
                       - type: bind
                         source: /var/lib/docker_data/nginx/conf.d
                         target: /etc/nginx/conf.d:rw
                       - type: bind
                         source: /var/lib/docker_data/nginx/vhost.d
                         target: /etc/nginx/vhost.d:rw
                       - type: bind
                         source: /var/lib/docker_data/nginx/html
                         target: /usr/share/nginx/html:rw
                       - type: bind
                         source: /var/lib/docker_data/nginx/certs
                         target: /etc/nginx/certs
                       - type: bind
                         source: /var/lib/docker_data/nginx/docker.sock
                         target: /var/run/docker.sock:ro
                networks:
                       - nextcloud
                restart: always
                #ports:
                #       - "80:80"
                #       - "443:443"
                container_name: nextcloud-nginx
                depends_on:
                       - mariadb
                       - nextcloud




networks:
        nextcloud:
                driver: bridge

When I’m starting all containers the db comes up and nextcloud is running on port 8080

netstat -an | grep :80 | grep -i listen
tcp6 0 0 :::8080 :::* LISTEN

docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
272d284f1a8c nginx “nginx -g 'daemon of…” 9 minutes ago Up 9 minutes 80/tcp nextcloud-nginx
f9ca13ea5e36 nextcloud “/entrypoint.sh apac…” 9 minutes ago Up 9 minutes 0.0.0.0:443->443/tcp, 0.0.0.0:8080->80/tcp nextcloud-nextcloud
dc1ee9f21807 mariadb “docker-entrypoint.s…” 9 minutes ago Up 9 minutes 3306/tcp nextcloud-mariadb

So far it works as expected.

When I’m stopping the container (docker stop nextcloud-nextcloud) I cant connect to port 8080 via webbrowser anymore and netstat said noting is listen on port 8080

BUT when I’m trying to open an connection at port 80, the default site from nginx comes up.
Why? I didn’t any port forwarding from the docker so port 80 shouldn’t be reachable from outside.
netstat -an | grep :80 | grep -i listen
delivers and empty list

Just to be sure, stopping the container with docker stop nextcloud-nginx
Result is as expected: No connection anymore to port 80.

-> So, question: Why nginx is reachable from outside?

Next step: Changing to port configuration:
nextcloud:
image: nextcloud
volumes:
- type: bind
source : /var/lib/docker_data/nextcloud/data
target : /var/www/html/data
- type: bind
source : /var/lib/docker_data/nextcloud/config
target : /var/www/html/config
networks:
- nextcloud
restart: always
ports:
- “8080:80”
# - “443:443”
container_name : nextcloud-nextcloud
depends_on:
- mariadb

nginx:
        image: nginx
        volumes:
               - type: bind
                 source: /var/lib/docker_data/nginx/conf.d
                 target: /etc/nginx/conf.d:rw
               - type: bind
                 source: /var/lib/docker_data/nginx/vhost.d
                 target: /etc/nginx/vhost.d:rw
               - type: bind
                 source: /var/lib/docker_data/nginx/html
                 target: /usr/share/nginx/html:rw
               - type: bind
                 source: /var/lib/docker_data/nginx/certs
                 target: /etc/nginx/certs
               - type: bind
                 source: /var/lib/docker_data/nginx/docker.sock
                 target: /var/run/docker.sock:ro
        networks:
               - nextcloud
        restart: always
        ports:
               - "80:80"
               - "443:443"
        container_name: nextcloud-nginx
        depends_on:
               - mariadb
                  ` - nextcloud`

Now should be port 80 and 443 provided by nginx, port 8080 still with nextcloud

docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
7d39bbf8d379 nginx “nginx -g 'daemon of…” 12 seconds ago Up 9 seconds 0.0.0.0:80->80/tcp, 0.0.0.0:443->443/tcp nextcloud-nginx
a01de1d07587 nextcloud “/entrypoint.sh apac…” 14 seconds ago Up 12 seconds 0.0.0.0:8080->80/tcp nextcloud-nextcloud
161cc81c1387 mariadb “docker-entrypoint.s…” 15 seconds ago Up 13 seconds 3306/tcp nextcloud-mariadb

Looks good so far.

netstat -an | grep :80 | grep -i listen
tcp6 0 0 :::80 :::* LISTEN
tcp6 0 0 :::8080 :::* LISTEN

netstat -an | grep :443 | grep -i listen
tcp6 0 0 :::443 :::* LISTEN

On port 80 the standard site from nginx appears.
On port 8080 the nextcloud is available
But nothing on port 443

So, why it’s not possible to use https? What do i have forgotten?

Many many thanks