COOPR 542: Add ability to configure UI to use TLS

SSL/TLS implemented for coopr-ui.
Use a different interim variable for COOPR_NODEJS_SSL_KEY and COOPR_NODEJS_SSL_CRT rather than overriding them...

or...

Have the node scripts use both COOPR_NODEJS_SSL_PATH and the KEY/CRT variables versus requiring the KEY/CRT variables to include the full PATH and filename.