Upload html file to Azure Storage static web hosting

uploadSite.js

function uploadSite(page){
    context.log("Upload site ");
    var blobService = storage.createBlobService();

    // create $web container
    blobService.createContainerIfNotExists('$web', function(){

        // upload index.html to $web container
        const options = { contentSettings: { contentType: 'text/html' } }
        blobService.createBlockBlobFromText("$web", "index.html", page, options, function (error) {
            context.log("uploaded");
            context.done();
        });
    });
}