Deploying to production - What should be injected for ippw.IKeyStore

The below lines are mentioned at the Startup.cs
```
#if USE_TEST_KEYS
#error !!!!!!!!!!!!!!!!!!!!!! Use of test keys is only supported for testing,
DO NOT USE FOR PRODUCTION !!!!!!!!!!!!!!!!!!!!!!!!!!!!!
services.AddSingleton();
#endif
```
And we just remove those lines except ` services.AddSingleton();` to test this out. Now to deploy to production, Should we implement our own keystore class which takes the private key from a keyvault with the current setup or what is the production deployment recommendation?