Short guide on how to prepare Debian package from zero_elabviewer sources

## Debian source package preparation

Clone or copy `zero_elabviewer` sources into `zero_elabviewer` directory
and instruct CMake to build Debian and RPM source packages bundle
```
rm -rf zero_elabviewer-build
mkdir -p zero_elabviewer-build
(cd zero_elabviewer-build && cmake -DDEV_MODE=true ../zero_elabviewer ) || exit 1
(cd zero_elabviewer-build && make open_build_service_bundle ) || exit 1
```
The source package bundle is located in `zero_elabviewer-build/target/pkg`
directory now.

## Prepare for Debian binary package build

```
rm -rf zero_elabviewer-deb
mkdir -p zero_elabviewer-deb
cp zero_elabviewer-build/target/pkg/* zero_elabviewer-deb
```

## Debian binary package build

Enter `cd zero_elabviewer-deb` directory with `zero-elabviewer.spec`,
`zero-elabviewer_X.Y-Z.debian.tar.xz` and `zero-elabviewer_X.Y.orig.tar.xz`
files.

```
dpkg-source -x zero-elabviewer_X.Y-Z.dsc
cd zero-elabviewer-X.Y
dpkg-buildpackage
```
