Feature: add prometheus logging

Partially closes internetarchive#11171.

Related:
internetarchive/olsystem#273
https://git.archive.org/iaux/server-config/-/merge_requests/95

Author: scottbarnes

compose.production.yaml

@@ -164,6 +164,9 @@ services:
       - ../olsystem/etc/haproxy/haproxy.cfg:/usr/local/etc/haproxy/haproxy.cfg:ro
     expose:
       - 7072
+    ports:
+      # For prometheus logging
+      - 8405:8405
     logging:
       options:
         max-size: "512m"