I've installed the PBIVIZ custom visualization tools by following the tutorial at https://powerbi.microsoft.com/en-us/documentation/powerbi-custom-visuals-getting-started-with-developer-tools.
However, I have an app on my dev machine that already uses port 8080. Can this port be changed to some other option, and how would I do that?
If not, may I suggest that you choose another, non-common port for the dev environment? 8080 is fairly popular already so there are bound to be conflicts.