Add "Message of the day" warning SSH users that they are operating in a production environment

[rikukissa]

When I log into a server, I'd like to clearly see it's QA / PROD / STAGING environment.

This could be both the hostname of the machine (so command prompt would include the environment) and also a MOTD when I login.

   ____                    _____ _______      _______ 
  / __ \                  / ____|  __ \ \    / / ____|
 | |  | |_ __   ___ _ __ | |    | |__) \ \  / / (___  
 | |  | | '_ \ / _ \ '_ \| |    |  _  / \ \/ / \___ \ 
 | |__| | |_) |  __/ | | | |____| | \ \  \  /  ____) |
  \____/| .__/ \___|_| |_|\_____|_|  \_\  \/  |_____/ 
        | |                                           
        |_|         

==================================

This is a PRODUCTION environment. All logins and commands are audited.
                                  

[adskyiproger]

Addressed at: opencrvs/infrastructure#32