docs: public static InputStream readFileToInputStream(String filePath)
              throws FileNotFoundException {
  
          InputStream is = null;
  
          try {
  
              is = new FileInputStream(filePath);
  
              logger.info("Completed read file for input stream " + " Path: "
                      + filePath + " at " + PcDateUtils.getNowDateTimeStr());
  
          } catch (Exception e) {
              logger.error("Error read file." + e);
          }
          return is;
  
      }