Leap/CDT versioning, dynamic updates and packages

[mikelik]

I have added documentation how to install DUNE (without need of git clone) *.deb package:
https://github.com/AntelopeIO/DUNE/blob/710132b73b1123957fcaff66a7e826737ad7f9b4/README.md#Binary-Installation-on-Linux

Dune scripts are installed to /usr/opt/DUNE/.
Dune image is downloaded just before creation of the first container.

New functionalities:

• added packaging scripts for creating DUNE *.deb package, example command: ./generate_package.sh deb ubuntu amd64
• upgrade DUNE image with dune --upgrade
• change CDT version with dune --cdt <version>
• change leap version with dune --leap <version>
• to build image with already prepared specific versions run bootstrap.sh script with below arguments, i.e. ./bootstrap.sh --leap=3.2.0 --cdt=3.1.0-rc1

MacOS packaging is separate task: #92
RPM and Chocolatey are separate task: #91

The example command that builds DUNE image with specific CDT/leap version:
docker build --no-cache --build-arg USER_ID=0 --build-arg GROUP_ID=0 --build-arg CDT_VERSION=3.1.0-rc1 --build-arg LEAP_VERSION=3.2.0 -f Dockerfile.unix -t dune

How to push out new DUNE image?
Added documentation https://github.com/AntelopeIO/DUNE/pull/75/files#diff-9c4ae3b5f6675180493e9a1a817baabf4c5314870a3fa67c9c6ab89186046a91

To do after this PR is merged:

• Prepare new DUNE image v1.0.0 and push it out to below address
• Make DUNE images public here: https://github.com/orgs/AntelopeIO/packages/container/package/dune

[ScottBailey]

Scripts should work from any directory. We can accomplish this with this code, for example:

SCRIPT=`readlink -f "$0"`
DIR=`dirname "$SCRIPT"`

[ScottBailey]

In generate_packaging.sh, architecture should simply default to all.

[ScottBailey]

This information:

docker tag dune ghcr.io/antelopeio/dune:latest
docker push ghcr.io/antelopeio/dune:latest
docker tag dune ghcr.io/antelopeio/dune:X.Y.Z
docker push ghcr.io/antelopeio/dune:X.Y.Z

Should go into doc/RELEASE.md or similarly named (could even go in TLD) and README.md should link to it.

[ScottBailey]

See comments in changed files.

[ScottBailey]

See comments.

[ScottBailey]

lgtm

[mikelik]

Thanks @ScottBailey.
As a follow up I have created two issues:

• User should know which leap/CDT versions are available to choose from #90
• Extend packaging to RPM and Chocolatey #91
  In this PR let's address deb and bottle/homebrew packaging.

[dimas1185]

after I fixed manually path, I've got this error:

./generate_package.sh brew Error, unsupported OS X version

I have Monterey 12.6 was it intended?

[mikelik]

I copied the scripts from CDT. After checking it seems that supported macOS versions are quite old.
We need to update the scripts. I have created new issue for it: #92

[mikelik]

@dimas1185 I have moved MacOS packaging to separate issue (#92) so the current PR is not blocked.

Moved out macOS packaging to separate issue: #92