Allow for custom user-supplied startup scripts

Dockerfiles/prod/data/docker-entrypoint.d/310-custom-startup-scripts.sh

@@ -0,0 +1,49 @@
+#!/usr/bin/env bash
+
+set -e
+set -u
+set -o pipefail
+
+
+############################################################
+# Functions
+############################################################
+
+###
+### Execute custom uesr-supplied scripts
+###
+execute_custom_scripts() {
+	local script_dir="${1}"
+	local debug="${2}"
+
+	if [ ! -d "${script_dir}" ]; then
+		run "mkdir -p ${script_dir}" "${debug}"
+	fi
+	script_files="$( find "${script_dir}" -type f -iname '*.sh' )"
+
+	# loop over them line by line
+	IFS='
+	'
+	for script_f in ${script_files}; do
+		script_name="$( basename "${script_f}" )"
+		log "info" "Executing custom startup script: ${script_name}" "${debug}"
+		if ! bash "${script_f}"; then
+			log "err" "Failed to execute script" "${debug}"
+			exit 1
+		fi
+	done
+}
+
+
+############################################################
+# Sanity Checks
+############################################################
+
+if ! command -v find >/dev/null 2>&1; then
+	echo "find not found, but required."
+	exit 1
+fi
+if ! command -v basename >/dev/null 2>&1; then
+	echo "basename not found, but required."
+	exit 1
+fi