Add config variable.

[WilmsJochen]

No description provided.

[firstmate-test-bot]

PR review

👍 Your pull request looks according to the guidelines!

sidenote:

✅ Deployment & testing pipelines
❌ Docker file structure:
   Your Dockerfile is missing from the repository. Ensure it is placed at the root level of the project. Additionally, follow the provided example closely, including using multiple build stages, not running as root, and maintaining the order of commands.
✅ File structure based on example repo
✅ Usage of proper tests [Unit tests, Postman etc.]
❌ General coding guidelines:

   - Updated Readme File:
      The README.md file is incomplete. It should contain setup instructions and how to run the application.
   - Use Retries for External APIs:
      No evidence of retries in API calls. Implement retry logic for external API calls.

⚠️ This repo is currently not following company guidelines.

You might want to look into this so I prepared some PR's to bring it up to date.

_{^{Generated by Firstmate to make sure you can focus on coding new features.}}