Extract builder from app

Building is different from running

lib/tasks/mrsk/app.rake

@@ -2,28 +2,6 @@ require_relative "setup"
 
 namespace :mrsk do
   namespace :app do
-    desc "Deliver a newly built app image to servers"
-    task deliver: %i[ push pull ]
-
-    desc "Build locally and push app image to registry"
-    task :push do
-      run_locally do 
-        begin
-          info "Building multi-architecture images may take a while (run with VERBOSE=1 for progress logging)"
-          execute *MRSK.app.push
-        rescue SSHKit::Command::Failed => e
-          error "Missing compatible buildx builder, so creating a new one first"
-          execute *MRSK.app.create_new_builder
-          execute *MRSK.app.push
-        end
-      end unless ENV["VERSION"]
-    end
-
-    desc "Pull app image from the registry onto servers"
-    task :pull do
-      on(MRSK.config.hosts) { execute *MRSK.app.pull }
-    end
-
     desc "Run app on servers (or start them if they've already been run)"
     task :run do
       MRSK.config.roles.each do |role|

lib/tasks/mrsk/builder.rake

@@ -0,0 +1,27 @@
+require_relative "setup"
+
+namespace :mrsk do
+  namespace :builder do
+    desc "Deliver a newly built app image to servers"
+    task deliver: %i[ push pull ]
+
+    desc "Build locally and push app image to registry"
+    task :push do
+      run_locally do 
+        begin
+          info "Building multi-architecture images may take a while (run with VERBOSE=1 for progress logging)"
+          execute *MRSK.builder.push
+        rescue SSHKit::Command::Failed => e
+          error "Missing compatible buildx builder, so creating a new one first"
+          execute *MRSK.builder.create
+          execute *MRSK.builder.push
+        end
+      end unless ENV["VERSION"]
+    end
+
+    desc "Pull app image from the registry onto servers"
+    task :pull do
+      on(MRSK.config.hosts) { execute *MRSK.builder.pull }
+    end
+  end
+end

lib/tasks/mrsk/mrsk.rake

@@ -2,10 +2,10 @@ require_relative "setup"
 
 namespace :mrsk do
   desc "Deploy app for the first time to a fresh server"
-  task fresh: %w[ server:bootstrap registry:login app:deliver traefik:run app:stop app:run ]
+  task fresh: %w[ server:bootstrap registry:login builder:deliver traefik:run app:stop app:run ]
 
   desc "Push the latest version of the app, ensure Traefik is running, then restart app"
-  task deploy: %w[ registry:login app:deliver traefik:run app:stop app:run prune ]
+  task deploy: %w[ registry:login builder:deliver traefik:run app:stop app:run prune ]
 
   desc "Rollback to VERSION=x that was already run as a container on servers"
   task rollback: %w[ app:restart ]