Do you want us to add SignServer to the Bitnami library? You can vote for it on our wishlist.
SignServer is an application framework performing cryptographic operations for other applications. It’s intended to be used in environments where keys are supposed to be protected in hardware but it isn’t possible to connect such hardware to existing enterprise applications or where the operations are considered extra sensitive so the hardware has to be protected more carefully. Another usage is to provide a simplified method to provide signatures in different application managed from one location in the company.