Initial provider implementation (#18)

This brings over the initial buildx prototype from pulumi/pulumi-docker
and fixes various build and release issues.

sdk/dotnet/Inputs/BuilderConfigArgs.cs

@@ -0,0 +1,31 @@
+// *** WARNING: this file was generated by pulumi. ***
+// *** Do not edit by hand unless you're certain you know what you are doing! ***
+
+using System;
+using System.Collections.Generic;
+using System.Collections.Immutable;
+using System.Threading.Tasks;
+using Pulumi.Serialization;
+
+namespace Pulumi.DockerBuild.Inputs
+{
+
+    public sealed class BuilderConfigArgs : global::Pulumi.ResourceArgs
+    {
+        /// <summary>
+        /// Name of an existing buildx builder to use.
+        /// 
+        /// Only `docker-container`, `kubernetes`, or `remote` drivers are
+        /// supported. The legacy `docker` driver is not supported.
+        /// 
+        /// Equivalent to Docker's `--builder` flag.
+        /// </summary>
+        [Input("name")]
+        public Input<string>? Name { get; set; }
+
+        public BuilderConfigArgs()
+        {
+        }
+        public static new BuilderConfigArgs Empty => new BuilderConfigArgs();
+    }
+}