Docker image in this repo can't be built - missing file

Hello, when I try and build the Dockerfile in this repo I get this error:

```
 > [15/22] COPY target/cloudgene-installer.sh /opt/cloudgene/cloudgene-installer.sh:
------
failed to compute cache key: "/target/cloudgene-installer.sh" not found: not found
```

There is no file `target/cloudgene-installer.sh`.

Can you help?
Thanks