Thanks Steven 
I have a few technical deficits. My hands on experience predates docker by a generation! in fact I remember when gosling’s justification of Java as a lightweight language was the hottest publication of the month - at the time I was a K&R C into ingres & oracle & sysadmin & dba
I think I’m detecting use of the words front end and back end as processes of running in the server and not as server-side client side is that right?
Have we got cooperating processes with shared memory or pipes or something between them sitting on the server and then a TCP encapsulated message stream sending stuff to the IP that has the client software on?
Has anybody drawn a block diagram of this architecture stuff ?