Answers

1. In ASP.NET Core, the name of the file where we store any settings specific to the production environment is called appsettings.Production.json.
2. The reason for our ASP.NET Core backend needing the Frontend setting is to set up the allowed origin in a CORS policy.
3. We would use npm run build:qa to produce a QA build.
4. If we didn't include the web.config file with our React frontend, we wouldn't be able to deep-link into our app—for example, putting the path to a question (such as https://qandafrontend.z19.web.core.windows.net/questions/1) directly in the browser's address bar and pressing Enter will result in a Page not found error being returned.
5. Connection strings contain a secret username and password. It is safer to store these in Azure rather than in our source code.