Shiny app server access problems

[mamcisaac]

Many of my students had trouble running the labs that rely on Shiny apps (sampling distributions) because they could not stay connected to the shiny server.

However, very little of the lab actually requires a shiny app (only exercise 6 in the sampling distribution lab (https://openintro.shinyapps.io/sampling_distributions/). If that shiny app were not embedded in the lab (e.g., it was a stand-alone shiny app linked to in the lab), then all students could access the static lab webpage and we would not have as much trouble getting so many students working on the lab at the same time.