keyfile parameter in DigitalOcean's related functions

[arydelek]

Function do_deploy_api() will not work with SSH key outside default location. It would be useful to add the keyfile parameter which is available in droplet_ssh function from analogsea package.

Thanks for considering.

[schloerke]

Don't have permissions to move the issue to meztez/plumberDeploy. So closing here and making a new issue in meztez/plumberDeploy.

See meztez/plumberDeploy#12