Add note on universal container

README.md

@@ -72,6 +72,12 @@ _or_
 
 # 💾 Run Your Own Instance
 
+ 🎉 🎉 🎉
+
+ __We've recently introduced a single universal container.  Migration for existing users is easy - please refer to [the documentation here](https://github.com/pglombardo/PasswordPusher/wiki/How-to-migrate-to-the-Universal-Container).__
+
+ 🎉 🎉 🎉
+
 _Note: Password Pusher can be largely configured by environment variables so after you pick your deployment method below, make sure to read [the configuration page](Configuration.md).  Take particular attention in setting your own custom encryption key which isn't required but provides the best security for your instance._
 
 ## On Docker