Add documentation for playwright exports

Author: thenav56

README.md

@@ -293,3 +293,7 @@ To import GEC codes along with country ids, run `python manage.py import-gec-cod
 ## SSO setup
 
 For more info checkout [GO-SSO](./docs/go-sso.md)
+
+## Playwright exports
+
+For more info checkout [Playwright exports](./docs/playwright-exports.md)

docs/playwright-exports.md

@@ -0,0 +1,39 @@
+## Backend
+
+Update `.env` with the following:
+```bash
+GO_WEB_INTERNAL_URL=http://host.docker.internal:3001
+# To enable playwright console/network logs
+DEBUG_PLAYWRIGHT=True
+```
+> [!IMPORTANT]
+> A second instance of the go-web-app will run at **port 3001** for Playwright.
+
+Start or update containers with:
+```bash
+# In the background
+docker compose up -d serve celery
+
+# In the foreground - Use this to view Playwright logs
+docker compose up serve celery
+```
+
+## Frontend
+
+For setup instructions, refer to: https://github.com/IFRCGo/go-web-app/?tab=readme-ov-file#local-development
+
+**We need two instances of the go-web-app:**
+1. For the host system (browser) on port 3000.
+2. For Celery workers (Playwright browser) on port 3001.
+
+To start the regular go-web-app:
+```bash
+pnpm start:app
+```
+
+For the additional go-web-app instance for Playwright:
+```bash
+APP_API_ENDPOINT=http://host.docker.internal:8000/ pnpm start:app --host --port 3001
+```
+> [!IMPORTANT]
+> The backend will be available at `host.docker.internal:8000` inside the Playwright container running within Celery.