Can not connect to Collabora server installed with docker-compose

Hi all,

since we’ve had some issues with the built-in Collabora CODE server before (server lock-ups, service availability), I just tried setting up a separate server in its own volume. Unfortunately, I’m unable to connect to it and not sure why.

This is the current compose-service:

services:
	collabora:
		image: collabora/code:latest
		restart: always
		ports:
			- 9980:9980
		cap_add:
			- MKNOD
		environment:
			- “domain=nextcloud\\.mydomain\\.com”
			- “username=some-username”
			- “password=some-password”
			- dictionaries='en de'
			- VIRTUAL_HOST=collabora.mydomain.tld
			- VIRTUAL_PORT=9980
			- VIRTUAL_PROTO=https
			- LETSENCRYPT_HOST=collabora.mydomain.tld
			- LETSENCRYPT_EMAIL=mail@mydomain.tld
		networks:
			- proxy-tier
		depends_on:
			- proxy

Which was added to this exact docker-compose file from the official examples:
https://github.com/nextcloud/docker/blob/master/.examples/docker-compose/with-nginx-proxy/postgres/fpm/docker-compose.yml

The volume builds fine, but whatever URL and ports I enter, I cannot connect to the server from Nextcloud. I’m not sure what’s wrong.

Has somebody tried this yet and is there a working config that I could look at? Or is there an obvious error I’ve missed?

Kind regards.