Updated the readme for the sass-and-ts example (#299)

Co-authored-by: Gleb Bahmutov <gleb.bahmutov@gmail.com>

Author: Revilotom

examples/sass-and-ts/README.md

@@ -4,16 +4,34 @@
 
 ![Sass test](images/sass.png)
 
-Note: run `npm install` in this folder to symlink the `cypress-react-unit-test` dependency.
+## Usage
 
+1. Make sure the root project has been built .
+
+```bash
+# in the root of the project
+npm install
+npm run build
 ```
+
+2. Run `npm install` in this folder to symlink the `cypress-react-unit-test` dependency.
+
+```bash
+# in this folder
 npm install
+```
+
+3. Start Cypress
+
+```bash
 npm run cy:open
 # or just run headless tests
 npm test
 ```
 
-Note that Node Sass is a binary dependency, thus we need to run it using the same system version of Node as we installed. See [cypress.json](cypress.json) file.
+## Notes
+
+Notice that Node Sass is a binary dependency, thus we need to run it using the same system version of Node as we installed. See [cypress.json](cypress.json) file.
 
 ```json
 {