Grab images as part of update e2e test

In general the `$(dirname $0)` expression needs two pairs of double quotes, one around `$0` and one around the `$(...)` expansion. But that's bad since that means nested double quotes, which work but are ugly: `"$(dirname "$0")"`.

My general suggestion is to start a shell script with:

```shell
basedir=$(basedir "$0")
```

Since in that case a single pair of double quotes is enough and then use `"${basedir}"` whenever the path to the script's directory is needed.