Revert "Update 3. Startup, Hosting and Middleware.md"
Revert "Update 3. Startup, Hosting and Middleware.md"

This reverts commit 704d10a047e17bfaf14cff6602074038a02a7004.

jongalloway/aspnetcore-workshop,jongalloway/aspnetcore-workshop,jongalloway/aspnetcore-workshop,jongalloway/aspnetcore-workshop