Screenshots below show the core steps in creating a simple web application on Microsoft Azure.
Click here for notes on Microsoft Application Insights
I found out l could not point my custom domain to this web app [reference, click here] unless l upgraded/switched to a minimum of the S1 production tier at about $48/mtn. The workaround l did, was to set my custom domain from google domains to forward to the web application URL created in Azure.
Click here for a good reference on App Service documentations and tutorials on publishing basic web apps.