Only install docker if missing

lib/tasks/mrsk/mrsk.rake

@@ -2,7 +2,7 @@ require_relative "setup"
 
 namespace :mrsk do
   desc "Deploy app for the first time to a fresh server"
-  task fresh: %w[ server:bootstrap registry:login build:deliver traefik:run app:stop app:run ]
+  task fresh: %w[ server:bootstrap deploy ]
 
   desc "Push the latest version of the app, ensure Traefik is running, then restart app"
   task deploy: %w[ registry:login build:deliver traefik:run app:stop app:run prune ]

lib/tasks/mrsk/server.rake

@@ -4,8 +4,7 @@ namespace :mrsk do
   namespace :server do
     desc "Setup Docker on the remote servers"
     task :bootstrap do
-      # FIXME: Detect when apt-get is not available and use the appropriate alternative
-      on(MRSK.config.hosts) { execute "apt-get install docker.io -y" }
+      on(MRSK.config.hosts) { execute "which docker || apt-get install docker.io -y" }
     end
   end
 end