Hi @Letícia Miranda ,
The Azure Functions Core Tools supports two types of deployment: deploying function project files directly to your function app via Zip Deploy and deploying a custom Docker container. You must have already created a function app in your Azure subscription, to which you'll deploy your code. Projects that require compilation should be built so that the binaries can be deployed. Remember, you must have the Azure CLI installed locally to be able to publish to Azure from Core Tools.
Please follow these steps outlined in this documentation" Work with Azure Functions Core Tools" to learn how to deploy your function project
Hope that helps. Let us know if you have further questions.