Split out repository to be used alone

lib/mrsk/configuration.rb

@@ -25,8 +25,12 @@ class Mrsk::Configuration
     @version ||= ENV["VERSION"] || `git rev-parse HEAD`.strip
   end
 
+  def repository
+    [ config.registry["server"], image ].compact.join("/")
+  end
+
   def absolute_image
-    [ config.registry["server"], "#{image}:#{version}" ].compact.join("/")
+    "#{repository}:#{version}"
   end
 
   def service_with_version

test/configuration_test.rb

@@ -19,6 +19,14 @@ class ConfigurationTest < ActiveSupport::TestCase
     end
   end
 
+  test "repository" do
+    configuration = Mrsk::Configuration.new(@config)
+    assert_equal "dhh/app", configuration.repository
+
+    configuration = Mrsk::Configuration.new(@config.tap { |c| c[:registry].merge!({ "server" => "ghcr.io" }) })
+    assert_equal "ghcr.io/dhh/app", configuration.repository
+  end
+
   test "absolute image" do
     configuration = Mrsk::Configuration.new(@config)
     assert_equal "dhh/app:123", configuration.absolute_image