This project is no longer maintained. Amazon are migrating their customers from SDK3 to SDK5 and also HSMv1 to HSMv2. You should have received notice from them.
What to do: ECAD Labs has released Signatory 1.2.0 which supports CloudHSMv2. This significantly reduces the complexity of using CloudHSM.
This is a Python Flask app that implements a Tezos Remote Signer. It receives messages from the Tezos baking client and returns signatures after applying policy and/or using an HSM.
The configuration instructions have moved to INSTALL.md.