example_logFile.log

      dir.create(paste0(input$HomeDirectory, 'gene_lists/'))
      file.copy(input$tier0List$datapath, paste0(input$HomeDirectory, 'gene_lists/', input$tier0List$name))
      file.copy(input$tier1List$datapath, paste0(input$HomeDirectory, 'gene_lists/', input$tier1List$name))
      file.copy(input$tier2List$datapath, paste0(input$HomeDirectory, 'gene_lists/', input$tier2List$name))
      # these genes will be copied to the output dir and this gene_list dir will be removed (in main bash script)
      
      ... done ...