message: desktop-starter build steps updated
diff: ## Build
  - Open the cloned repo in VS Code
  -- Edit [./src/backend/main.ts](https://github.com/imodeljs/desktop-starter/blob/master/src/backend/main.ts#L55)
  -- Replace `REPLACE_WITH_CLIENT_ID` with your Client ID
  - - Ex: `const clientId = "native-XXXXXXXXXXXXXXXXXXX";`
  -- Remove the `assert` on the next line that verifies the Client ID is set
  +- Edit [./src/backend/main.ts](https://github.com/imodeljs/desktop-starter/blob/master/src/backend/main.ts#L46)
  +- Edit `getClientId` to return your Client ID by replacing `REPLACE_WITH_CLIENT_ID`
  + - Ex: `return "native-XXXXXXXXXXXXXXXXXXX";`
  - `npm install`
  -- `npm run build`
  ## Run
  