added dev script

dev-scripts/backup-vols

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+mkdir -p /backup-vols
+
+vols=$(docker volume ls --quiet)
+
+for vol in $vols
+do
+  echo "Volume: $vol"
+  pathToMount=($(docker volume inspect $vol --format {{.Mountpoint}}))
+  tar -cf /backup-vols/$vol-$(date +%Y_%m_%d_%H_%M_%S).tar -C $pathToMount .
+  echo ================================
+done