Add apps

[CherryKitten]

I want to add at least the following apps before I'm comfortable calling it a 1.0 release:

• [X] https://hub.docker.com/r/linuxserver/calibre-web
• [X] https://www.duplicati.com/
• [ ] https://emby.media/
• [ ] At least one system monitoring tool
• [X] https://www.home-assistant.io/ and/or https://www.openhab.org/
• [X] https://nextcloud.com/
• [X] https://pyload.net/
• [X] https://tautulli.com/
• [x] At least one IRC bouncer/client
• [x] At least one all-in-one mailserver solution
• [ ] https://github.com/zulip/zulip