Creating an Azure function

Azure Functions are usually small pieces of code that can be executed on Azure without us having to deploy a server. This solution is often called Function as a Service, or FaaS. For this reason, functions can also be seen as microservices or even nanoservices. They're lightweight and enable a small piece of functionality. Functions are based on Web Apps, as discussed in Chapter 6, Designing Web Applications. They even show in your Web Apps overview. However, functions aren't exactly the same as Web Apps, so they come with some limitations. For example, while Web Apps support logging to files, functions can only use Application Insights for monitoring, which we will discuss in Chapter 13, Diagnostics and Monitoring. Having ARR affinity or always on functionality in functions also wouldn't make much sense, so they're not...