What is Rocket.Chat stack
Rocket.Chat stack is a package of and extensions, that allow the team communication open-source app run smoothly and fill in that crucial information gap by allowing you to host team chats on your server.
Rocket.chat is a free alternative to Slack and others, which is very good for new enterprises. Your team members can log in with ease and have complete control over data.
Features:
- Team/conference chat
- Helpdesk live-chat
- Video conferencing
- Hashtagging
Who is using Rocket.Chat
- Developers
- Project managers
- Startupers
Number of VPS servers required: 1
Companion apps
NGINX - is an HTTP and reverse proxy server, a mail proxy server, and a generic TCP/UDP proxy server

Fail2ban scans log files and bans IPs that show the malicious signs. Highly recommended for simple VPS server setup
Docker Status Panel - is a minimalistic docker container management panel written in Python / Flask microframework.
Portainer is a lightweight management UI that allows you to easily manage your different Docker environments (Docker hosts or Swarm clusters)