fix npm link issue

[emmkong]

NPM link issues

If you need to do npm link in your local environment you might encounter the following issues:

• https://reactjs.org/warnings/invalid-hook-call-warning.html#duplicate-react
• Empty theme context for 'external' components styled-components/styled-components#2379

Both react and styled-components cause duplicate instance issue after npm link, to fix that we need to ensure both app project and lib project are sharing the same instance of them. ( * must follow the order of following commands )

• in orcs-design-system folder,

  • npm link {PATH_APP_REPO}/node_modules/react
  • npm link {PATH_APP_REPO}/node_modules/styled-components
  • npn link

• in {PATH_APP_REPO}

  • npm i orcs-design-system
  • npm start