Is your feature request related to a problem? Please describe.
Answer: SSH Key feature should exist, for security at core, as major VPS provisioning modules and panels support them in today's world, it is also required by people to secure their servers.
Describe the solution you'd like
Answer: Clients should be able to add their own SSH Key to the server during the order process, they should be able to add, remove or add additional keys from the product page as well.