docker buildx build -> docker build

lib/kamal/commands/builder/base.rb

@@ -14,7 +14,7 @@ class Kamal::Commands::Builder::Base < Kamal::Commands::Base
   end
 
   def push
-    docker :buildx, :build,
+    docker :build,
       "--push",
       *platform_options,
       "--builder", builder_name,

lib/kamal/commands/builder/remote.rb

@@ -18,7 +18,7 @@ class Kamal::Commands::Builder::Remote < Kamal::Commands::Builder::Base
   end
 
   def push
-    docker :buildx, :build,
+    docker :build,
       "--push",
       *platform_options,
       "--builder", builder_name,

lib/kamal/configuration/docs/builder.yml

@@ -1,10 +1,10 @@
 # Builder
 #
-# The builder configuration controls how the application is built with `docker build` or `docker buildx build`
+# The builder configuration controls how the application is built with `docker build`
 #
 # If no configuration is specified, Kamal will:
 # 1. Create a buildx context called `kamal-<service>-multiarch`
-# 2. Use `docker buildx build` to build a multiarch image for linux/amd64,linux/arm64 with that context
+# 2. Use `docker build` to build a multiarch image for linux/amd64,linux/arm64 with that context
 #
 # See https://kamal-deploy.org/docs/configuration/builder-examples/ for more information