update the host files to point to accessible docker container names for backends

added testing for this, including mock backend server.

dockerfiles/services/sslproxy/cli/up

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+set -e
+#set -x
+
+LOCAL_IMAGE=sslproxy
+TAG=2.2.${BUILD_NUMBER:-dev}
+REMOTE_IMAGE=dkregistry.xai-corp.net:5000/${LOCAL_IMAGE}:${TAG}
+
+LOG=$(mktemp)
+
+export LOCAL_IMAGE
+export REMOTE_IMAGE
+export TAG
+
+    # shellcheck disable=SC2068
+    docker-compose \
+    -f docker-compose.yml \
+    -f docker-compose.build.yml \
+    up $@