#147 - backend operator redesign doc

[xutongNV]

Description

Issue #147

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.

[ecolternv]

One executable with mulitple corroutines should be enough for most cases, especially since golang can take advantage of multiple CPU cores.
Maybe we could offer both options. By default the executable will run all 3 listeners

backend-listener

But with command line args, you can make it only run one listener, so you could run multiple copies of it

backend-listener --workflow-listener
backend-listener --resource-listener
backend-listener --event-listener

So if you want them separate for a larger cluster, you can do that