enable acces_log
https://docs.posit.co/shiny-server/#access-logs
An access log can be configured globally using the access_log parameter. This log is not enabled by default. This setting controls the location of the access log as well as the format used. The access log can be useful to audit the security and activity taking place on your Shiny Server installation. These logs can be audited manually or automatically to inspect how often various resources are being accessed, or by whom they are being accessed (using the originating IP address). Currently, one access log is created for the entire Shiny Server process; all Shiny applications share this access log.
A ajouter si nécessaire.