Revert "Simplify builders config"

test/integration/docker/deployer/app/config/deploy.yml

@@ -23,8 +23,7 @@ registry:
   username: root
   password: root
 builder:
-  driver: docker
-  arch: <%= Kamal::Utils.docker_arch %>
+  multiarch: false
   args:
     COMMIT_SHA: <%= `git rev-parse HEAD` %>
 healthcheck:

test/integration/docker/deployer/app_with_roles/config/deploy.yml

@@ -17,8 +17,7 @@ registry:
   username: root
   password: root
 builder:
-  driver: docker
-  arch: <%= Kamal::Utils.docker_arch %>
+  multiarch: false
   args:
     COMMIT_SHA: <%= `git rev-parse HEAD` %>
 healthcheck:

test/integration/main_test.rb

@@ -77,7 +77,7 @@ class MainTest < IntegrationTest
     assert_equal "app-#{version}", config[:service_with_version]
     assert_equal [], config[:volume_args]
     assert_equal({ user: "root", port: 22, keepalive: true, keepalive_interval: 30, log_level: :fatal }, config[:ssh_options])
-    assert_equal({ "driver" => "docker", "arch" => "amd64", "args" => { "COMMIT_SHA" => version } }, config[:builder])
+    assert_equal({ "multiarch" => false, "args" => { "COMMIT_SHA" => version } }, config[:builder])
     assert_equal [ "--log-opt", "max-size=\"10m\"" ], config[:logging]
     assert_equal({ "cmd"=>"wget -qO- http://localhost > /dev/null || exit 1", "interval"=>"1s", "max_attempts"=>3, "port"=>3000, "path"=>"/up", "cord"=>"/tmp/kamal-cord", "log_lines"=>50 }, config[:healthcheck])
   end