docs: add openapi link

README.md

@@ -26,7 +26,7 @@
     - [1. Clone the repository](#1-clone-the-repository)
     - [2. Navigate to the Project Directory:](#2-navigate-to-the-project-directory)
   - [Usage](#usage)
-  - [Documentation 📚](#documentation-)
+  - [Documentation 📖](#documentation-)
   - [Contributors](#contributors)
   - [License](#license)
 
@@ -90,14 +90,13 @@ docker compose up --build
 ```
 
 After starting the application, the frontend should be available at [http://localhost:3000/](http://localhost:3000/) and should pop up in your default browser.
-The backend should be available at [http://localhost:8080/](http://localhost:8080/).
+The backend should be available at [http://localhost:8080/](http://localhost:8080/). The backend has OpenAPI documentation available at [http://localhost:8080/swagger-ui.html](http://localhost:8080/swagger-ui.html) generated straight from the source code.
 
 For the full development setup, see the [Developer Setup](docs/manuals/developer_setup.md) guide.
 
-## Documentation 📚
+## Documentation 📖
 - [Developer Setup](docs/manuals/developer_setup.md) 🛠️
 - [Testing](docs/manuals/testing.md) 🧪
-- [API Documentation](docs/manuals/api_documentation.md) 📖
 - [Docker Guide](docs/docker.md) 🐳
 - [Understanding the Minimax Algorithm](docs/minimax.md) 🧠
 - [Architecture](docs/architecture.md)  🏗️