Did not add the docker entrypoint file

v4.0.1

barker/barker/__version__.py

@@ -1 +1 @@
-__version__ = "4.0.0"
+__version__ = "4.0.1"

barker/docker-entrypoint.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+set -e
+
+cp /app/frontend/* /frontend
+
+exec "$@"

barker/pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "barker"
-version = "4.0.0"
+version = "4.0.1"
 description = "Point of Sale for a restaurant"
 authors = ["tanshu <git@tanshu.com>"]