---

owner@nextcloud:~$ docker exec -it collabora bash
permission denied while trying to connect to the docker API at unix:///var/run/docker.sock
owner@nextcloud:~$ sudo usermod -aG docker $USER
[sudo] password for owner: 
owner@nextcloud:~$ newgrp docker
owner@nextcloud:~$ docker exec -it collabora bash
cool@f0af0676abb4:/$ sed -i 's|<enable type="bool">false</enable>|<enable type="bool">true</enable>|' /etc/coolwsd/coolwsd.xml
cool@f0af0676abb4:/$ owner@nextcloud:~$