This pull request includes several updates to the README.md file to enhance the tutorial with additional instructions and images, as well as a minor change to the server/__main__.py file. The most important changes include adding detailed steps for introducing a security vulnerability in a pull request and including relevant images to guide users through the process.

Enhancements to the tutorial in README.md:

• Added a note and image to clarify the forking process, ensuring users uncheck "Copy the main branch only" when forking the repository.
• Introduced a new section with detailed steps and images to guide users through the process of introducing a security vulnerability in a pull request, including creating the pull request, checking the status, and reviewing security alerts.

Minor change in server/__main__.py:

• Added a hardcoded GitHub personal access token, which should be avoided for security reasons.