Add file with basic command all scripts should run

script/include/global_header.inc.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+# scriptz/global_header.inc: Any basic things that should be executed at the
+#                            beginning of any and every script
+
+# If any command fails, immediately exit the script
+set -e
+
+# Ensure the working directory is the app root directory
+cd "$(dirname "${0}")/.."
+
+# Source all function definition files
+source ./script/include/*_functions.inc.sh