Housekeeping (#8)

* Rename the provider to dockerbuild.
* Add Makefile targets required by CI.
* Add per-language test targets compatible with CI.
* Fix broken example yaml.
* Add gitignore exclusions to fix SDK generation in CI.
* Fix lint errors.
* Vendor pulumi CLI via `tools.go` instead of `.pulumi`.
* Consolidate `go.mod`s into one file, with a minimal `go.mod` for the
Go SDK.
* Add codecov.

provider/provider_test.go

@@ -0,0 +1,57 @@
+// Copyright 2016-2023, Pulumi Corporation.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package provider
+
+import (
+	"testing"
+
+	"github.com/blang/semver"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	p "github.com/pulumi/pulumi-go-provider"
+	"github.com/pulumi/pulumi-go-provider/integration"
+	"github.com/pulumi/pulumi/sdk/v3/go/common/resource"
+	"github.com/pulumi/pulumi/sdk/v3/go/common/tokens"
+)
+
+func TestRandomCreate(t *testing.T) {
+	t.Parallel()
+
+	prov := provider()
+
+	response, err := prov.Create(p.CreateRequest{
+		Urn: urn("Random"),
+		Properties: resource.PropertyMap{
+			"length": resource.NewNumberProperty(12),
+		},
+		Preview: false,
+	})
+
+	require.NoError(t, err)
+	result := response.Properties["result"].StringValue()
+	assert.Len(t, result, 12)
+}
+
+// urn is a helper function to build an urn for running integration tests.
+func urn(typ string) resource.URN {
+	return resource.NewURN("stack", "proj", "",
+		tokens.Type("test:index:"+typ), "name")
+}
+
+// Create a test server.
+func provider() integration.Server {
+	return integration.NewServer(Name, semver.MustParse("1.0.0"), Provider())
+}