Rename to Kamal

lib/kamal/cli/server.rb

@@ -0,0 +1,21 @@
+class Kamal::Cli::Server < Kamal::Cli::Base
+  desc "bootstrap", "Set up Docker to run Kamal apps"
+  def bootstrap
+    missing = []
+
+    on(KAMAL.hosts | KAMAL.accessory_hosts) do |host|
+      unless execute(*KAMAL.docker.installed?, raise_on_non_zero_exit: false)
+        if execute(*KAMAL.docker.superuser?, raise_on_non_zero_exit: false)
+          info "Missing Docker on #{host}. Installing…"
+          execute *KAMAL.docker.install
+        else
+          missing << host
+        end
+      end
+    end
+
+    if missing.any?
+      raise "Docker is not installed on #{missing.join(", ")} and can't be automatically installed without having root access and the `curl` command available. Install Docker manually: https://docs.docker.com/engine/install/"
+    end
+  end
+end