ssh key setup

[johnstudarus]

Instructions need to detail that the user ~/.ssh/id_rsa.pub is included into the Packet project as an authorized key or a new SSH key needs to be generated and added to the hosts during provisioning.

[johnstudarus]

Or instructions to use ssh-agent

eval `ssh-agent`
ssh-add ~/.ssh/id_rsa

This is likely because I'm using an existing project rather than creating a new project.

[pereztr5]

@enkelprifti98 Will fix the expected ssh key behavior in the PR #12.