Migrating from old way to hb-service
**Describe Your Problem:**

I have homebridge installed on an Ubuntu VM running on ESX. I set it up many moons ago before Homebridge UI or hb-service were a thing. I would like to migrate my existing setup to hb-service so I gain the benefits associated.

Some notes:

* My config lives at /var/homebridge/config.json so I don't think the instructions posted [here](https://github.com/homebridge/homebridge/issues/2721#issuecomment-729258981) work out of the box?
* I do have Homebridge UI installed and have made a backup using it
* I have used hb-service to update node (`v14.15.4`)
* Homebridge itself and all plugins are up to date as confirmed by Homebridge UI
* I currently run one large homebridge instance with 6 plugins installed. This has caused problems in the past where one plugin malfunctions and takes the whole system down ([details](https://github.com/homebridge/homebridge/issues/2339)). While I'm making these changes would it be possible / advisable to split this out into multiple homebridge instances? If so, can I do so without having to completely re-do my HomeKit config, automations, etc?

**Environment:**

* **Node.js Version**: 14.15.4
* **NPM Version**: 6.14.11
* **Homebridge Version**: 1.1.7
* **Operating System**: Ubuntu 20.04.1 LTS (dedicated VM, does nothing other than homebridge)
* **Process Supervisor**: init.d I believe. The restart command in Homebridge UI is set to `sudo service homebridge restart`