message: added into swarm_qa_tools.md additional info as contained in wiki in Devs: Web Monitor
diff: @@ -134,6 +134,7 @@ To start web monitor for swarm, in one terminal window you have to start the sve
  ```
  cd $HOME/libra/ol/cli/web-monitor
  +# run `npm install` if this is the first time otherwise:
  npm run dev
  ```
  