docs: rewrited old README.md

README.md

@@ -1,6 +1,33 @@
 # PROMO v2: Promo Code Backend
 
-Это ваш личный репозиторий для решения второго этапа в треке Backend.
+My solution for the second stage of the PROD olympiad 2025. Passes all tests.
-Вы можете редактировать файлы **только в директории `solution`**.
 
-Условие задания и публичные тесты доступны [в данном репозитории](https://github.com/Central-University-IT/FAQ-2025/tree/main/backend).
+Task: [github.com/Central-University-IT/FAQ-2025/tree/main/backend](https://github.com/Central-University-IT/FAQ-2025/tree/main/backend).
+
+## Running tests
+
+### Prerequisites
+
+Ensure you have the following installed on your system:
+
+- [Python](https://www.python.org/) (>=3.10,<3.12)
+- [uv](https://docs.astral.sh/uv/)
+- [Docker](https://www.docker.com/) (for containerized setup)
+
+### Go to tests directory
+
+```bash
+cd tests
+```
+
+### Install dependencies
+
+```bash
+uv sync --no-dev
+```
+
+### Run tests
+
+```bash
+sh run-tests.sh
+```