Server issue after UI upgrade
### Current Situation

Hello,
today I updated the newest UI but during the installation something was wrong and now I cannot access by Broswer
I can access by terminal but all command doesn't works
I don't have backup I need to recover at minimum my json to copy an save for potential reinstallation
<img width="650" alt="Schermata 2021-11-25 alle 20 17 04" src="https://user-images.githubusercontent.com/70729310/143492079-256b8b5f-ded4-46cf-bb06-007abc96743d.png">
 

### Logs

```markdown
pi@homebridge:~ $ sudo hb-service start
sudo: hb-service: command not found
pi@homebridge:~ $ hb-service start
-bash: /usr/local/bin/hb-service: Permission denied
pi@homebridge:~ $
```


### Configuration

```json
pi@homebridge:~ $ /var/lib/homebridge/config.json
-bash: /var/lib/homebridge/config.json: No such file or directory
```


### Environment

- OS: PI 3+
- Software: Homebridge 1.3.8
- Node:v14.18.1
- npm:8.1.0


### Process Supervisor

not applicable

### Additional Context

_No response_