Create a server

Creates a new server in the project. The protocol_type determines which additional connection parameters are required: SSH needs hostname and username, FTP needs hostname, username, and password, S3 needs bucket_name, access_key_id, and secret_access_key. For managed_vps, pass region, size, and os_image at the top level. For static_hosting, pass hosted_website_attributes at the top level. For custom_action, pass commands and a Docker image inside server: either docker_image, or docker_image_source curated with curated_template_id.