Access Homebridge Node Env
Hello! 

I'm playing around with a plugin, [homebridge-switchmate-ble](https://github.com/AMoo-Miki/homebridge-switchmate-ble), which doesn't seem to be focused on use with Raspberry Pi/Homebridge UI. 

I'd like to run the command (corresponding to a script in `bin/`) in the readme to find the IDs of my switchmates:
```
switchmate-ble find
```
in `/var/lib/homebridge/node_modules/homebridge-switchmate-ble`.

I also may need to give node some permissions per the readme:
```
sudo setcap 'cap_net_raw,cap_net_admin+eip' `which node`
```

However, when I'm ssh-ed in as the `pi` user, I find I don't have node/npm in the PATH. I can see there is a user, `homebridge`, which I imagine is the homebridge server user which has the homebridge node env for plugins, but it doesn't have a password set. 

Is the best route for accessing a plugin like this setting a password for user `homebridge` so I can `su` and access the node environment? Wondering if that will cause any issues internally for the homebridge server...

There are loads of alternative options here like setting up node for the `pi` user and cloning the repo to play with this plugin, possibly doing something locally on my Mac to get the IDs, etc., but I thought this might be a helpful question for the community. 

Thanks in advance! 