Now You can source the script with .(dot) and use individual functions.
This also makes it easier to use in `infra-ci` Ansible roles.
Signed-off-by: Jakub Sokołowski <jakub@status.im>
This originally lived in the `infra-ci` repo but I think it makes more
sense to if to be in this repo, since here it can be changed by devs as
the project evolves.
Signed-off-by: Jakub Sokołowski <jakub@status.im>