Apply clang-format to dockerdwrapper.c

[killenheladagen]

Describe your changes

Apply clang-format to dockerdwrapper.c and add a .clang-format file in the repo.

Issue ticket number and link

Checklist before requesting a review

• [x ] I have performed a self-review of my own code
• I have verified that the code builds perfectly fine on my local system
• I have added tests that prove my fix is effective or that my feature works
• [x ] I have commented my code, particularly in hard-to-understand areas
• [x ] I have verified that my code follows the style already available in the repository
• [x ] I have made corresponding changes to the documentation