Use IPv6 (localhost)

Also revert previous commit setting address to all interfaces :{}
Note: Head with this commit was never on Remote.

prototype/src/main/resources/application.properties

@@ -16,5 +16,5 @@ spring.jpa.hibernate.ddl-auto=update
 # ----------------------------------------
 
 # EMBEDDED SERVER CONFIGURATION (ServerProperties)
-server.address=::
+server.address=::1
 server.port=8080