Create README.md (use content from core repo)

README.md

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+# Initial setup
+It is recommended to install Playwright's official Visual Studio Code [extension](https://marketplace.visualstudio.com/items?itemName=ms-playwright.playwright) for a better testing experience and an interactive GUI.
+## Shared functions
+Create a `.env` file in the root folder of the project for your user credentials and host URL. `HOST`, `USER` and `PASSWORD` are the environment variables required to run shared functions.
+
+Here's an example `.env` file contents:
+```bash
+export HOST="https://localhost:4173"
+export ACCOUNT_USERNAME="user"
+export ACCOUNT_PASSWORD="user"
+```
+### Using shared variables
+Importing shared functions from `shared.ts`:
+```typescript
+import { login, host } from  './shared';
+```
+\
+Usage of shared functions in tests:
+```typescript
+test('Test', async ({ page }) => {
+    await login(page); // Login
+    await page.goto(`${host}/test/`); // Go to /test route
+});
+```
+## Playwright Docs
+You can check Playwright documentation [page](https://playwright.dev/docs/intro) for more details, guides and information.