config.json NOT generated after installing homebridge app through Synology DSM
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**Describe The Bug:**
<!-- A clear and concise description of what the bug is. -->
config.json NOT generated after installing homebridge app through Synology DSM

Homebridge folder has been created, however, there is no config.json file generated at the folder
<img width="973" alt="image" src="https://user-images.githubusercontent.com/8107509/166132365-d36794b9-e773-4037-9d73-f7a051881e60.png">

This lead to issue that the homebridge UI not accessible.
<img width="879" alt="image" src="https://user-images.githubusercontent.com/8107509/166132377-eca7a57d-9fca-4985-a545-55e2cc38fa37.png">


**To Reproduce:**
<!-- Steps to reproduce the behavior. -->
Synology model: ds218j 
Homebridge app version : 3.00
<img width="700" alt="image" src="https://user-images.githubusercontent.com/8107509/166132405-55464e01-2331-43b9-a5d5-ed3d3e7454cd.png">

**Expected behavior:**
<!-- A clear and concise description of what you expected to happen. -->

**Logs:**
<!-- Bug reports that do not contain logs may be closed without warning. -->

```
Show the Homebridge / Homebridge Config UI X logs here.
```

**Homebridge Config:**

```json
Show your homebridge config.json here
```

**Screenshots:**
<!-- If applicable, add screenshots to help explain your problem. -->

**Environment:**

* **Node.js Version**: <!-- node -v -->
* **NPM Version**: <!-- npm -v -->
* **Homebridge Version**: <!-- homebridge -V --> 3 
* **Homebridge Config UI X Version**:
* **Operating System**: Synology NAS
* **Process Supervisor**: Docker / Systemd / init.d / pm2 / launchctl / hb-service / other / none


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