Add process.uptime()

[dxdc]

Is your feature request related to a problem? Please describe:
The uptime is reported as os.uptime() but doesn't give any indication of when homebridge was last restarted. It would be useful to help troubleshoot, for example, if there was a specific module that forced a restart of the homebridge service without necessarily causing a server restart.

Also, just as a point of confusion, initially I thought that Uptime meant Homebridge Uptime, not Server Uptime. It would be still useful to have both values, however.

Describe the solution you'd like:
I'm not sure if it's as simple as modifying os.uptime() here to process.uptime() and importing the process nodeJS module (e.g., /src/modules/status.service.ts. Then, to output this on the appropriate status pages.

There's a better way to refactor the uptime calculation so you wouldn't have to repeat it twice though, but just as an example:

const process = require('process');

...

    // homebridge uptime
    const procuptime: any = {
      delta: Math.floor(process.uptime()),
    };

    procuptime.days = Math.floor(procuptime.delta / 86400);
    procuptime.delta -= procuptime.days * 86400;
    procuptime.hours = Math.floor(procuptime.delta / 3600) % 24;
    procuptime.delta -= procuptime.hours * 3600;
    procuptime.minutes = Math.floor(procuptime.delta / 60) % 60;

Describe alternatives you've considered:
N/A

Additional context:
N/A

[stale]

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