Unable to understand how to deploy the azure function for "react-chatgpt-app"

[mvcsharepointdev]

I want to install the react-chatgpt-app SPFx. and as part of the prerequisites is that we need to install an azure function, now i unzip the azure function folder where i got those :-

so how i can deploy this azure function to azure function app? the documentation mentioned the following:-

In the directory ./OpenAIFunctionProject/OpenAI-azure-functions.zip you will found the project with AzureFunction zip.ed, please copy to local computer unzip and deploy. The Azure Function App needs to be configured with Authentication Provider Microsoft , please see the README.md file on the project.
also the readme mentioend the following:-

To deploy you can use the Azure Extensions for VSCODE , go to "WORKSPACE" and on top Options select Deploy.

so what that mean exactly?

Thanks