Extract builder from app

Building is different from running

lib/mrsk/commander.rb

@@ -1,5 +1,6 @@
 require "mrsk/configuration"
 require "mrsk/commands/app"
+require "mrsk/commands/builder"
 require "mrsk/commands/prune"
 require "mrsk/commands/traefik"
 require "mrsk/commands/registry"
@@ -20,6 +21,10 @@ class Mrsk::Commander
     @app ||= Mrsk::Commands::App.new(config)
   end
 
+  def builder
+    @builder ||= Mrsk::Commands::Builder.new(config)
+  end
+
   def traefik
     @traefik ||= Mrsk::Commands::Traefik.new(config)
   end

lib/mrsk/commands/app.rb

@@ -1,14 +1,6 @@
 require "mrsk/commands/base"
 
 class Mrsk::Commands::App < Mrsk::Commands::Base
-  def push
-    docker :buildx, :build, "--push", "--platform linux/amd64,linux/arm64", "-t", config.absolute_image, "."
-  end
-
-  def pull
-    docker :pull, config.absolute_image
-  end
-
   def run(role: :web)
     role = config.role(role)
 
@@ -64,10 +56,6 @@ class Mrsk::Commands::App < Mrsk::Commands::Base
     docker :image, :prune, "-a", "-f", *service_filter
   end
 
-  def create_new_builder
-    docker :buildx, :create, "--use", "--name", "mrsk"
-  end
-
   private
     def service_filter
       [ "--filter", "label=service=#{config.service}" ]

lib/mrsk/commands/builder.rb

@@ -0,0 +1,15 @@
+require "mrsk/commands/base"
+
+class Mrsk::Commands::Builder < Mrsk::Commands::Base
+  def create
+    docker :buildx, :create, "--use", "--name", "mrsk"
+  end
+
+  def push
+    docker :buildx, :build, "--push", "--platform linux/amd64,linux/arm64", "-t", config.absolute_image, "."
+  end
+
+  def pull
+    docker :pull, config.absolute_image
+  end
+end