Challenge: Add misconfiguration for mounting in secret in during build

[Shubham-Patel07]

What kind of changes does this PR include?

• Fixes or refactors
• A new challenge
• Additional documentation
• Something else

To Do

• Embed the secret variable in https://github.com/OWASP/wrongsecrets/blob/master/.github/scripts/docker-create.sh and make sure it lands in a file in the docker container
• create a challenge that reads the secret from that file and teaches why this is a bad idea (See contributing.md)

Relations

Closes #812

Checklist:

• All the contributions made are solely the work of me and my co-authors
• I tested the changes in this PR (if applicable)
• I added unit tests to ensure my change works (when change in Java or on front-end code)
• I added UI tests to ensure my UI changes work (when change in the overall UI, not needed if just adding a challenge)
• The PR passes pre-commit hooks and automated tests

[Shubham-Patel07]

Hi @commjoen sir,
the env_var is not properly been injected to container for some reason
Please check the Dockerfile
https://github.com/OWASP/wrongsecrets/pull/1790/files#diff-dd2c0eb6ea5cfc6c4bd4eac30934e2d5746747af48fef6da689e85b752f39557R20-R26

[commjoen]

Files have been shared over Slack ^^, looking forward to the challenge implementation good sir!

[commjoen]

Thank you for your PR @Shubham-Patel07 ! Just a final lap to go! Can you please have a look at the suggested changes, then we can merge this baby :)