docs: add "Features of running on a localhost" doc

Author: vOrigins

README.md

@@ -1,6 +1,8 @@
 # APIHUB UI auto-tests
 This project is used to create and run auto-tests, primarily for UI E2E. The framework used is [Playwright](https://playwright.dev/).
 
+[Features of running on a **localhost**](docs/localhost-run.md)
+
 ## Contents
 - [Installation](#installation)
 - [Environment variables](#environment-variables)
@@ -26,7 +28,7 @@ Before starting test execution, you need to set environment variables in any con
 
 **TEST_USER_PASSWORD** - The password that will be used by test users.
 
-**PLAYGROUND_BACKEND_HOST** - Only Required for testing on **localhost**. The host that will be used in the test to create a custom server for sending requests. More information can be found at the [link](https://github.com/Netcracker/qubership-apihub/issues/18).
+**PLAYGROUND_BACKEND_HOST** - Only Required for testing on **localhost**. The host that will be used in the test to create a custom server for sending requests. More information can be found at the [link](docs/localhost-run.md).
 
 **DEV_PROXY_MODE** - Only Required for testing on **localhost** in dev proxy mode.
 

docs/localhost-run.md

@@ -0,0 +1,12 @@
+# Features of running on a localhost
+To test the "Playground" via a localhost, in playwright tests, you need to set a value for the `PLAYGROUND_BACKEND_HOST` environment variable, it will be used in the test to create a custom server for sending requests.
+In case of using Docker Compose, this is `http://host.docker.internal:8081` (protocol + value of the `APIHUB_URL` variable from the [qubership-apihub-backend.env](https://github.com/Netcracker/qubership-apihub/blob/main/docker-compose/qubership-apihub-backend.env) file). Also, you need to add the variable `ALLOWED_HOSTS=host.docker.internal` to the [qubership-apihub-backend.env](https://github.com/Netcracker/qubership-apihub/blob/main/docker-compose/qubership-apihub-backend.env) file.
+
+In case of using docker compose + dev proxy, in addition to the previous settings, in playwright tests, you need to add the variable `DEV_PROXY_MODE=true`, to skip tests that cannot be executed in this mode.
+
+
+|                                               | Live environment | Docker compose                                                                                                                       | Docker compose + dev proxy                                                                                                          |
+| --------------------------------------------- | ---------------- | ------------------------------------------------------------------------------------------------------------------------------------ | ----------------------------------------------------------------------------------------------------------------------------------- |
+| Playground tests                              | ✔️               | ✔️ `ALLOWED_HOSTS=host.docker.internal` - in docker compose<br>`PLAYGROUND_BACKEND_HOST=http://host.docker.internal:8081` - in tests | ✔️ `ALLOWED_HOSTS=host.docker.internal` - in docker compose<br>`PLAYGROUND_BACKEND_HOST=http://host.docker.internal:8081` - in test |
+| Tests with rediretcs to the Agent             | ✔️               | ✔️                                                                                                                                   | ❌ Skipped with `DEV_PROXY_MODE=true` - in tests                                                                                     |
+| Expand/collapse the Package page sidebar test | ✔️               | ✔️                                                                                                                                   | ❌ Skipped with `DEV_PROXY_MODE=true` - in tests                                                                                     |