Migrating from 8.1 Ubuntu 12.4

[tflidd]

@noordkriek

I also read some nice things about collabora office, but then I would need a SSL certificate that is not self-signed. Is LetsEncrypt a certificate that I can use in that case?

There is a longer thread with discussion about the collabora installation. Not sure if someone managed to make it run with letsencrypt:

Issue installing Collabora following official guide

What does your docker container say in the logs? I suppose the connection attempt is somehow failing