Update Dockerfile to R 4.4.0 (patches vulnerability in rds file deserialization).

Dockerfile

 # Install R
-FROM r-base:4.3.1
+FROM r-base:4.4.0
 
 # Set maintainer/author label
 # Overrides label from base image

image_data_explorer.R

@@ -94,7 +94,6 @@ source("R/stats.R")
 ## Delay execution of expr until after all session inputs have been set
 execute_after_input <- function(expr, session = getDefaultReactiveDomain()) {
   observeEvent(once = TRUE, reactiveValuesToList(session$input), {
-    print("HERE")
     force(expr)
   }, ignoreInit = TRUE)
 }