Web interface does not work when nanominer is started as a system service on Ubuntu
Ubuntu 20.20
nanominer-linux-1.9.5

Web interface works when i start the miner manually
When using the following startup script, the web interface fails to load with a `404 - Cannot open requested path`


```
[Unit]
Description=Start miner

[Service]
ExecStart=/home/nanominer-linux-1.9.5/nanominer /home/nanominer-linux-1.9.5/config.ini
ExecStop=/usr/bin/pgrep nanominer | /usr/bin/xargs kill

Restart=always

[Install]
WantedBy=default.target
```

