Slim down image to 15 MBHEADmain

Base the image off Alpine to get another nice size saving:

    REPOSITORY                             TAG         IMAGE ID      CREATED        SIZE
    localhost/inotify                      alpine      0346632c3067  4 hours ago    15 MB
    localhost/inotify                      debian      2d99b1b27626  4 hours ago    94 MB

Functionality remains the same.

1 files changed, 1 insertions, 1 deletions

diff --git a/monitor.sh b/monitor.sh
index c40055c..e853f64 100755
--- a/monitor.sh
+++ b/monitor.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 set -exo pipefail