For some reason it seems as though the binaries as part of `libheif1` install not to `/usr/local/bin` but to `/usr/local` and so were not on the path, therefore the default value of photoprism's `--heifconvert-bin` / `$PHOTOPRISM_HEIFCONVERT_BIN` (`heif-convert`) would not be resolved
* improve error handling to show more details
* improve the way it checks for root password
* consistant getty_override
* streamline verbose mode
* remove v4 scripts
* small tweaks