document intent behind graplctl.Dockerfile
#
# graplctl
+#
+# This image is intended to be used to execute graplctl in integration and
+# end-to-end tests. It is unsuitable for other purposes, primarily because it
+# contains the following fake AWS credentials:
+#
+# /home/grapl/.aws/credentials:
+# [default]
+# aws_access_key_id=fake
+# aws_secret_access_key=fake
+#
################################################################################
FROM python:3.7-slim-buster AS graplctl
