fix(cmd-api-server): fix references to `cockpitWwwRoot`

**Describe the bug**

There are references to `cactus-cockpit`, which are undefined:

https://github.com/hyperledger-cacti/cacti/blob/acfe239333977c6376f9d3d35afcd527f7a2bd1e/packages/cactus-cmd-api-server/src/main/typescript/config/config-service.ts#L267

**Solution**

Check the role of `cockpitWwwRoot` and the possibility of deprecation