Add README.md

README.md

@@ -0,0 +1,13 @@
+# tfmigrate-storage
+
+This repository maintains a history storage implementation for [tfmigrate](https://github.com/minamijoyo/tfmigrate).
+
+Note that this repository is a larger work of [hashicorp/terraform](https://github.com/hashicorp/terraform) and is distributed in MPL 2.0.
+
+This repository is kept separate from the tfmigrate only for license reason and doesn't accept any feature request or bug report. Please open it to the [tfmigrate](https://github.com/minamijoyo/tfmigrate) repository.
+
+Since this repository is dedicated to the tfmigrate, do not use this for other purposes. The compatibility of the public interface as a Go library is not guaranteed and there is no versioning policy.
+
+## License
+
+Mozilla Public License v2.0