Try zsh

entrypoint.sh

@@ -1,8 +1,7 @@
-#!/bin/bash
+#!/bin/zsh
 # e is for exiting the script automatically if a command fails, u is for exiting if a variable is not set
 # x would be for showing the commands before they are executed
 set -eu
-shopt -s globstar
 
 # FUNCTIONS
 # Function for setting up git env in the docker container (copied from https://github.com/stefanzweifel/git-auto-commit-action/blob/master/entrypoint.sh)