Install failure - ffmpeg-for-homebridge dependency error
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# Bug Report

### Describe the Bug
Upon attempting to install homebridge-ring through the Homebridge UI, the process fails with the error message below.  It seems as if it may be failing when attempting to install the ffmpeg-for-homebridge@0.1.4 dependency?  If so, any ideas?  This is an entirely fresh version of homebridge (Docker) with a fresh version of the latest homebridge-ring.  Thanks!

### To Reproduce
Steps to reproduce the behavior:
 - Start Homebridge
 - Attempt to install homebridge-ring through the UI
 - See error

### Expected behavior
I expect homebridge-ring to install successfully without error.

### Screenshots/Logs
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-----------------------------------------------------------------------
USER: root
DIR: /var/lib/homebridge
CMD: npm install --save homebridge-ring@11.3.1

[##################] | reify:date-fns: http fetch GET 200 https://registry.npmjs.org/d
> ffmpeg-for-homebridge@0.1.4 install
> node install.js

node:internal/modules/cjs/loader:988s: http fetch GET 200 https://registry.npmjs.org/d
  throw err;
  ^

Error: Cannot find module '/homebridge/node_modules/homebridge-ring/node_modules/ffmpeg-for-homebridge/install.js'
    at Function.Module._resolveFilename (node:internal/modules/cjs/loader:985:15)
    at Function.Module._load (node:internal/modules/cjs/loader:833:27)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12)
    at node:internal/main/run_main_module:22:47 {
  code: 'MODULE_NOT_FOUND',
  requireStack: []
}
npm ERR! code 1
npm ERR! path /homebridge/node_modules/homebridge-ring/node_modules/ffmpeg-for-homebridge
npm ERR! command failed
npm ERR! command sh -c -- node install.js

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/homebridge/.npm/_logs/2022-10-16T21_30_58_267Z-debug-0.log

Operation failed. Please review log for details.

-----------------------------------------------------------------------
-----------------------------------------------------------------------

### Additional context
I have successfully run homebridge-ring for over a year on a different device (Raspberry Pi), and I'm attempting a fresh install on a new device (Synology DS220+).  In both cases, I'm running homebridge in a Docker container. I tried the following:

- importing my original Homebridge backup
- starting from a new Homebridge clean install
- installing homebridge-ring through the web UI
- installing homebridge-ring through the homebridge terminal

### Homebridge Ring Config
Post homebridge-ring platform config  _without sensitive information_
```

No config as the plugin will not install

```

### Environment
 - OS: Docker on a Synology NAS (DSM7)
 - Node.js: 16.18.0
 - NPM: 8.19.2
 - homebridge-ring: latest (can't actually install)
 - homebridge: 1.5.0
 - hoobs: N/A
