Document simplest possible float scenario

I'd love to have a documentation of the simplest approach with float:

• One container/service beeing deployed
• No monitoring (prometheus, grafana)
• No backup
• No vpn (only needed in between multiple hosts afaik)
• No sso / auth proxy
• No central log service (elastic stack, kibana etc)

Questions:

• What's replds ? Is it needed in the most simple scenario ?

In this issue I'll be documenting my findings how to get there.