Hello @wwe
This morning I decided to start from scratch. I still have the problem of creating the proxy network that is not done, so forced manually created
docker network create proxy
Before lauching anything, here is the status of my newly created files 
[root@cassiopea:~/nc-docker] # ll
total 56
drwxr-xr-x 8 root root 4096 avril 16 12:39 ./
drwx------ 13 root root 4096 avril 16 12:38 ../
drwxr-xr-x 2 test-nc test-nc 4096 avril 16 12:39 apps/
drwxr-xr-x 2 test-nc test-nc 4096 avril 16 12:39 config/
-rwxr-xr-x 1 test-nc test-nc 270 avril 16 12:38 cron.sh*
drwxr-xr-x 2 test-nc test-nc 4096 avril 16 12:39 data/
drwxr-xr-x 2 test-nc test-nc 4096 avril 16 12:39 db/
-rw-r--r-- 1 root root 4930 avril 16 12:35 docker-compose.yml
-rw-r--r-- 1 root root 286 avril 16 12:36 .env
drwxr-xr-x 2 test-nc test-nc 4096 avril 16 12:39 nextcloud/
-rw-r--r-- 1 root root 682 avril 16 12:37 nextcloud.env
-rw-r--r-- 1 test-nc test-nc 0 avril 16 12:39 redis-session.ini
-rw-r--r-- 1 root root 743 avril 16 12:38 remoteip.conf
drwxr-xr-x 2 root root 4096 avril 16 12:39 secrets/
Then i launch the script and as expected I have an error message regarding notify push
Error response from daemon: failed to create task for container: failed to create shim task: OCI runtime create failed: runc create failed: unable to start container process: exec: "/var/www/html/custom_apps/notify_push/bin/x86_64/notify_push": stat /var/www/html/custom_apps/notify_push/bin/x86_64/notify_push: no such file or directory: unknown
a quick glance with ‘docker ps -a’ shows me all my containers up. The two tests to check the state of redis and PostgreSQL are ok and the I manage to connect to my Nextcloud container to launch the manual configuration of notify_push. So there was a problem on my side. Again sorry for asking you wrongly. L launch the installation and the activation of notify push… It’s ok
I take the opportunity to take a look at the logs of the containers but there are alerts that do not seem good. In the first lines of the log I have this alert that appears :
chmod: changing permissions of '/var/run/postgresql': Operation not permitted
Then this alert comes back in loop :
2024-04-16 11:41:51.822 UTC [57] FATAL: role "test-nc" does not exist
Is this normal ?
I finally push the third line but also the message of error 
[root@cassiopea:~/nc-docker] # docker compose exec app sh -c 'php occ notify_push:setup https://${OVERWRITEHOST}/push'
✓ redis is configured
🗴 can't connect to push server: cURL error 7: Failed to connect to blackcat-studio.net port 443 after 55 ms: Couldn't connect to server (see https://curl.haxx.se/libcurl/c/libcurl-errors.html) for https://blackcat-studio.net/push/test/cookie
An idea to help me ?
Thanks