Update README.md

Added Cypress to testing sections

README.md

@@ -155,6 +155,12 @@ By default the running app uses port `8080`.
     $ npm test:coverage
     ```
 
+- Run Cypress tests with GUI (or use :run to run without GUI):
+  
+    ```
+    $ npm run cypress:open
+    ```
+
 ### Running code linter
 
 - To check the code for linting errors:
@@ -245,6 +251,7 @@ Testing framework
 - [Jest](https://jestjs.io/) is used for running the tests and for test assertions. Running on [Jsdom](https://github.com/jsdom/jsdom) environment by default, which was a headless browser.
 - [simple-mock](https://github.com/jupiter/simple-mock) and [MockDate](https://github.com/boblauer/MockDate) are used for mocking and spies.
 - [Enzyme](https://github.com/airbnb/enzyme) is used to make testing React Components easier.
+- [Cypress](https://www.cypress.io/) is used for larger E2E type testing.
 
 Running Vscode debugger
 ----------------------