Initial commit based off of Apache recommendations.

Based on the example from https://infra.apache.org/licensing-howto.html#example-notice

Signed-off-by: Matt Ray <github@mattray.dev>

NOTICE

@@ -0,0 +1,9 @@
+OpenCost
+Copyright 2022 Cloud Native Computing Foundation
+
+This product includes software developed at
+The Cloud Native Computing Foundation (http://www.cncf.io).
+
+The Initial Developer of some parts of the specification and project is
+Kubecost (http://www.kubecost.com).
+Copyright 2019 - 2022 Stackwatch Incorporated. All Rights Reserved.