Yesterday, I showed how to deploy a local function app with one function to Azure. There is an important gotcha out of a mistake I learned before: I deployed my local app to an existing function app in Azure that already has a function in it. Since the existing function was not in the local function app folder, Azure treated it as not part of the deployment, thereby only the local function appeared in Azure. The lesson is that a local function app represents a function app in Azure, so existing functions in Azure should exist locally if you want to add a new function or modify existing ones.