@Myriam Lemire For better understanding the issue: Are you referring to" How to secure Azure Storage account"?
This article contains security recommendations for Blob storage. Implementing these recommendations will help you fulfill your security obligations as described in our shared responsibility model: https://learn.microsoft.com/en-us/azure/storage/blobs/security-recommendations
You can serve static content (HTML, CSS, JavaScript, and image files) directly from a storage container named $web. Hosting your content in Azure Storage enables you to use serverless architectures that include Azure Functions and other Platform as a service (PaaS) services. Azure Storage static website hosting is a great option in cases where you don't require a web server to render content: https://learn.microsoft.com/en-us/azure/storage/blobs/storage-blob-static-website
This article will explains and provide detailed information: How a static website works and configured in Azure Storage: https://learn.microsoft.com/en-us/azure/storage/blobs/storage-blob-static-website-how-to?tabs=azure-portal
Are you are looking to configure your storage account to accept requests from secure connections only by setting the Secure transfer required property for the storage account: https://learn.microsoft.com/en-us/azure/storage/common/storage-require-secure-transfer