Question: Setting up additional apps on top of (nextcloud+nginx reverse-proxy+letsencrypt + mariadb))

The question forums does not show up so I assume it was closed down.

I am using the docker compose file you made for (nextcloud+nginx reverse-proxy+letsencrypt + mariadb)

https://hackprogramming.com/how-to-setup-subdomain-or-host-multiple-domains-using-nginx-in-linux-server/

I am trying to add other containers for the reverse proxy to serve. I planned on doing this by requiring domain.com/app1 , domain.com/app2, etc... instead of having nextcloud on domain.com. When all is done I will have a website hosted at domain.com that the reverse proxy serves but that website is not Nextcloud. NextCloud will be at domain.com/app1 . Other applications will be at domain.com/app2, etc...

In the docker compose file, I tried changing the virtual host to VIRTUAL_HOST=domain.com/app1
but it broke the setup of NextCloud. It was not possible to access then website. When I did
VIRTUAL_HOST=domain.com
it worked fine.

Start with the linked Docker Compose setup guide and the configuration using VIRTUAL_HOST=domain.com. Trace how the reverse proxy handles host and path routing for Nextcloud and additional containers, then define the expected behavior for domain.com/app1 and domain.com/app2 and verify that the existing Nextcloud setup remains accessible.