Upgrade dependencies

flash.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+set -e
+
+ISO="build/livedisk.iso"
+DISK="/dev/disk/by-id/usb-Generic_USB_SD_Reader_12345678901234567890-0:0"
+
+if [ ! -f "$ISO" ]
+then
+  echo "Did not find ISO $ISO"
+  exit 1
+fi
+
+if [ ! -b "$DISK" ]
+then
+  echo "Did not find disk $DISK"
+  exit 1
+fi
+
+echo "Flashing $ISO to $DISK"
+pv "$ISO" | sudo dd of="$DISK"
+sync
+sudo eject "$DISK"
+echo "Successfully flashed $DISK"