Murfey server still looks for security configuration file path from environment variable instead of machine configuration

[tieneupin]

When running murfey.server, it appears to not get the path to the security configuration from the machine configuration, even though a key for it has already been implemented. User authentication on the FastAPI web page fails when the security configuration environment variable is unset.

[d-j-hatton]

That should be fixed but the environment variable should still be able to override the value set in the machine config

[tieneupin]

OK, I'll fix it such that it looks for the OS variable followed by the machine config key before crashing.