I recently installed it a matrix server (synapse the official implementation) and can connect to it through the riot.im web cilent (on the riot.im website) and

I recently installed it a matrix server (synapse the official implementation) and can connect to it through the riot.im web cilent (on the riot.im website) and riot.im node client. The preview docker image of mattermost is easier to install but I installed matrix because I couldn't get the production docker version of mattermost to work. I wasted most of time configuring the vhost and the SSL certificates.