fileInput not working properly with Docker Windows system - r

Question

I am quite new to Docker and need to host an R Shiny App on Docker. Any help would be appreciated. Please let me know if I need to change something in the DOckerFile.
R ShinyApp works perfectly fine on a local computer but it crashes while using Docker to host it.I suspect something wrong with the fileInput$datapath and Windows/Docker interaction. Do I need to specify the PATH in the DockerFile?
I have used rocker/verse image from Docker Hub,installed the libraries manually and stored the image locally on my computer as 'r_all_libraries_july2'
This is the image I have used in my DockerFile.
The Shiny Code works well in a Linux environment. But, crashes while running docker in Windows Environment. A temporary file is also getting created in the production environment when a file is input in the Shiny App using fileInput.
library(shiny)
library(DT)
library(dplyr)
library(shinycssloaders)
library(readxl)
library(shinyjs)
library(ggplot2)
library(png)
library(spatstat)
require(tibble)
require(magrittr)
require(dplyr)
require(multcomp)
require(emmeans)
require(readxl)
library(httr)
require(ggfortify)
library(shinyjs)
library(shinyBS)
ui <-navbarPage(title="RShinyApp", windowTitle = "Data Visualization", theme = shinythemes::shinytheme("cerulean"),selected = "Load Data",
tabPanel(title="Load Data", #3rd Tab Panel Start,
fluidPage(useShinyjs(),
sidebarLayout(
sidebarPanel(
wellPanel(checkboxGroupInput("filetype", "Choose filetype to upload:",
choices = c("CSV"="csv", "Excel"="excel"))),
conditionalPanel(condition = "(input.filetype=='csv')|(input.filetype=='excel')",
wellPanel(checkboxInput(inputId = 'header', label = 'Header', value = FALSE)),
fileInput(inputId = "file", label = "Upload File", accept = c(".csv",".xlsx"))
),#End of conditional panel
uiOutput("sheetnames")
#conditionalPanel(condition = "(input.filetype=='excel')&(!is.null(input.file))",uiOutput("sheetnames")),
),#sidebarpanel
mainPanel(
# h3("Data Table"),
withSpinner(tableOutput("contents"))
)
)#SideBarLayout
)#FluidPage End
) #3rd Tab Panel End
)#navbarpage
server <-function(input,output,session){
###########Load Data Tab#######################
rv<-reactiveValues(data=NULL,xlorcsv=NULL,head=FALSE,sheet=NULL,features=NULL)
observeEvent(input$filetype,{if(input$filetype=='csv'){rv$xlorcsv<-'csv'}
else if(input$filetype=='excel'){rv$xlorcsv<-'excel'}})
observeEvent(input$header, rv$head<-input$header)
observeEvent(input$sheetnames,rv$sheet<-input$sheetnames)
observeEvent(input$file,
{if((!is.null(rv$xlorcsv))&(!is.null(input$file))){
#####THIS IS WHERE THE SHINY APP IS CRASHING IN DOCKER--my guess is datapath ###########needs to be defined here
if(rv$xlorcsv=='csv'){rv$data<-read.csv(input$file$datapath, header = rv$head, na.strings = "")
rv$features<-colnames(rv$data)}
}
})
output$sheetnames<-renderUI({
if((is.null(rv$xlorcsv))|(is.null(input$file))){return(NULL)}
if((rv$xlorcsv=='excel')&(!is.null(input$file))){selectInput("sheetnames","Select sheet to load",choices = excel_sheets(path = input$file$datapath))}
})
output$contents<-renderTable({rv$data})
}
shinyApp(server=server, ui=ui)
DockerFile:
FROM r_all_libraries:latest
EXPOSE 80
COPY r_shiny_code_working11.R /home/rstudio/r_shiny_code_working11.R
CMD ["/home/rstudio/r_shiny_code_working11.R"]
This is the error on the console:
standard_init_linux.go:207: exec user process caused "no such file or directory"