Determines if the app is deployed to a server or running locally, and adjusts
the config environment to "production" or "default", respectively. This function
is almost always called in the global.R file of a Shiny app immediately before
the configuration in the config.yml is read in.
set_config_env(override = NULL)invisible(NULL)
Set the environment to "default" or "production" manually. CAUTION:
Be sure you know the difference between "default" & "production" configuration environments.
Using the "production" environment will affect the database of the deployed application.