Configurable cert & key location

[richcar58]

Allow the location of the certificate and the private key to be configurable in the ~/.tms/config/tms.toml file. Currently, tms_server expects the full certificate chain to be in ~/.tms/certs/cert.pm and the private key to be in ~./tms/certs/key.pm. These locations should be the default but overridable from the configuration file.

Another approach would be to create a script automatically invoked on cert/key update that copies the cert and key to the ~./tms/certs directory of the id that runs tms_server as follows:

    cd ~/.tms/certs (as root)
    cp -p /etc/letsencrypt/live/tms-server-dev.tacc.utexas.edu/fullchain.pem cert.pem    
    cp -p /etc/letsencrypt/live/tms-server-dev.tacc.utexas.edu/privkey.pem key.pem
    chmod 600 cert.pem key.pem
    chown <tms_userid>:<tms_userid> cert.pem key.pem 

[scblack321]

This may not be a good idea.
Instead, it might be better to configure a post-processor for when the key and cert get updated.
The post-processor would move them into the ~/.tms/certs directory and update the permissions.