Generates the server part of the isoviewer app

app_server(data_dir, allow_data_upload, allow_folder_creation, store_data)

Arguments

data_dir

the directory for local data files

allow_data_upload

whether to allow uploading of data

allow_folder_creation

whether to allow creation of folders on the server

store_data

whether data files (including .rds exports) are stored permanently (TRUE) or just temporarily (FALSE)