message: add a log message
diff: @@ -73,6 +73,7 @@ export class Viewer {
  }
  const url = `http://localhost:${this.extension.server.port}/viewer.html?file=${pdfFilePrefix}${encodePath(pdfFile)}`
  this.extension.logger.addLogMessage(`Serving PDF file at ${url}`)
  + this.extension.logger.addLogMessage(`The decoded path is ${pdfFile}`)
  return url
  }
  