Added script to scripts folder that updates all docker images &

containers in subfolders.

scripts/docker-compose-update-subs

+#!/bin/bash
+for d in $(ls -d */); do
+        echo -e "\n==> pulling $d"
+        cd $d; dc pull;
+        echo -e "==> up $d"
+        dc up -d;
+        cd ..;
+done