Initial provider implementation (#18)

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

sdk/dotnet/Outputs/CacheToAzureBlob.cs

@@ -0,0 +1,56 @@
+// *** 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.Outputs
+{
+
+    [OutputType]
+    public sealed class CacheToAzureBlob
+    {
+        /// <summary>
+        /// Base URL of the storage account.
+        /// </summary>
+        public readonly string? AccountUrl;
+        /// <summary>
+        /// Ignore errors caused by failed cache exports.
+        /// </summary>
+        public readonly bool? IgnoreError;
+        /// <summary>
+        /// The cache mode to use. Defaults to `min`.
+        /// </summary>
+        public readonly Pulumi.DockerBuild.CacheMode? Mode;
+        /// <summary>
+        /// The name of the cache image.
+        /// </summary>
+        public readonly string Name;
+        /// <summary>
+        /// Blob storage account key.
+        /// </summary>
+        public readonly string? SecretAccessKey;
+
+        [OutputConstructor]
+        private CacheToAzureBlob(
+            string? accountUrl,
+
+            bool? ignoreError,
+
+            Pulumi.DockerBuild.CacheMode? mode,
+
+            string name,
+
+            string? secretAccessKey)
+        {
+            AccountUrl = accountUrl;
+            IgnoreError = ignoreError;
+            Mode = mode;
+            Name = name;
+            SecretAccessKey = secretAccessKey;
+        }
+    }
+}