message: brief addition to readme
diff: # webclades
  +
  +This app is a simple web-tool to assign Nextstrain clade to the SARS-CoV-2 sequences.
  +It is not currently deployed anywhere and is very much work in progress.
  +
  +To run in locally in development mode, do:
  +```bash
  +cp .env.example .env
  +cd packages/web
  +yarn install
  +yarn dev
  +```
  +which should serve the app on port `3000`.
  +
  