Update pre_install.sh

Author: frdel

docker/run/fs/ins/pre_install.sh

@@ -1,6 +1,9 @@
 #!/bin/bash
 set -e
 
+# update apt
+apt-get update
+
 # fix permissions for cron files if any
 if [ -f /etc/cron.d/* ]; then
     chmod 0644 /etc/cron.d/*