Add to the readme, add notes on yarn

README.md

@@ -1,32 +1,75 @@
 # PRX Acceptance Tests
 
-Acceptance tests for PRX systems
+Acceptance tests for PRX systems using Cypress.
 
-Written in [Cypress](https://www.cypress.io/)
+## What is Cypress?
+
+Cypress is a next-generation front end testing tool built for the modern web.
+It enables you to write all types of tests:
+- End-to-end tests
+- Integration tests
+- Unit tests
+
+We're using for E2E tests to cover core functionality of apps at PRX.
+
+## Requirements
+
+- [Node.js](https://nodejs.org/) (preferably managed with [asdf](https://github.com/asdf-vm/asdf))
+- [Yarn](https://yarnpkg.com/)
 
 ## Installation
 
-You probably have NodeJS installed via `asdf` right?
+1. Clone this repository
+2. Install dependencies:
+   ```sh
+   yarn install
+   ```
+3. Configure your test user/pass/fixtures:
+   ```sh
+   cp env-example .env
+   # Edit .env with your settings
+   ```
 
-Then let's get started:
+## Running Tests
 
-```sh
-yarn
+There are two main ways to run Cypress tests:
 
-# configure your test user/pass/fixtures
-cp env-example .env
-vi .env
+### Headless Mode (Run)
 
-# run the tests headless
+Run tests in headless mode:
+```sh
 yarn test
+```
 
-# open cypress
+This command runs all tests in the terminal without opening a browser window.
+It's useful for continuous integration environments or when you want to quickly
+run all tests.
+
+### Interactive Mode (Open)
+
+Open Cypress Test Runner:
+```sh
 yarn start
 ```
 
-## Development
+This command opens the Cypress Test Runner, a graphical user interface that allows you to:
+- See all test files
+- Choose specific tests to run
+- Watch tests run in real time in the browser
+- Debug tests using browser developer tools
+
+The Test Runner is particularly useful during test development and debugging.
+You can set a `debugger` statement or inspect the DOM!
+
+## Writing Tests
+
+Cypress tests are located in the `cypress/e2e` directory. To create a new test:
+
+1. Create a new `.cy.ts` file in the `cypress/e2e` directory
+2. Write your test using Cypress commands
+3. Run your test using the Cypress Test Runner or command line
 
-I'm still figuring it out, okay?
+For more information on writing Cypress tests, refer to the [Cypress Documentation](https://docs.cypress.io/).
 
 ## License