Added hack to fix issue with porter storage plugin

.devcontainer/Dockerfile

@@ -62,4 +62,6 @@ ENV GO111MODULE=auto
 
 # [Optional] Uncomment this section to install additional OS packages.
 # RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
-#     && apt-get -y install --no-install-recommends <your-package-list-here>
+#     && apt-get -y install --no-install-recommends <your-package-list-here>
+
+RUN curl -sL https://aka.ms/InstallAzureCLIDeb | sudo bash

docker/Dockerfile

@@ -18,7 +18,13 @@ ENV TOOLHOME="/usr/local/bin"
 ENV PORTER_HOME="${TOOLHOME}/.porter"
 ENV PATH=$PATH:$PORTER_HOME
 
-RUN apk add --update curl coreutils libc6-compat && rm -rf /var/cache/apk/*
+# TODO: remove 'make bash py-pip' when porter storage issue is fixed
+RUN apk add --update make bash py-pip curl coreutils libc6-compat && rm -rf /var/cache/apk/*
+
+# Install az cli (TODO: remove when porter storage issue is fixed)
+RUN apk add --virtual=build gcc libffi-dev musl-dev openssl-dev python3-dev \
+    && pip install azure-cli \
+    && apk del --purge build
 
 # Install porter 
 RUN mkdir -p $PORTER_HOME \

pkg/run/run.go

@@ -35,6 +35,9 @@ type parameterSet struct {
 //Run runs Porter with the Azure driver, using environment variables
 func Run() error {
 
+	// Hack to get around issue with Porter not liking an empty blob container without a schema file in
+	uploadSchema()
+
 	config, err := getConfig()
 	if err != nil {
 		log.Fatalf("%s\n", err)
@@ -58,6 +61,21 @@ func Run() error {
 	return nil
 }
 
+func uploadSchema() {
+	tempDir, _ := ioutil.TempDir("", "cnabarmdriver")
+	schemaFilePath := path.Join(tempDir, "schema")
+	schemaFile := `{"claims":"cnab-claim-1.0.0-DRAFT+b5ed2f3","credentials":"cnab-credentialsets-1.0.0-DRAFT+b6c701f","parameters":"cnab-parametersets-1.0.0-DRAFT+TODO"}`
+	ioutil.WriteFile(schemaFilePath, []byte(schemaFile), 0644)
+	cmd := exec.Command("az", "storage", "blob", "upload", "--connection-string", os.Getenv("AZURE_STORAGE_CONNECTION_STRING"), "--container-name", "porter", "--name", "schema", "--file", schemaFilePath)
+	log.Println(cmd.String())
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	err := cmd.Run()
+	if err != nil {
+		log.Fatalf("porter command failed with %s\n", err)
+	}
+}
+
 func buildPorterCommandParams(cnabInstallationName string, cnabAction string, cnabBundleTag string) []string {
 	credsPath, err := generateCredsFile(cnabInstallationName)
 	if err != nil {