Azure Functions, in my opinion, should mostly be used in cases when you want to do some work over some time every now and then. It will also probably be cheaper

Azure Functions, in my opinion, should mostly be used in cases when you want to do some work over some time every now and then. It will also probably be cheaper to use something else in your case. In later versions of AF you can use a real Startup file to mitigate some life cycle related issues.