feat: allow overriding docker config yaml paths

[timcosta]

The current startup script doesnt allow someone running the actions image to change the path it loads configuration yaml files from. This is an important feature because some consumers will need to load files from something like a mounted EFS volume rather than just load the config files that are baked into the container by default.

[github-actions[bot]]

Unit Test Results (build & test)

61 tests  ±0   61 :heavy_check_mark: ±0   4s :stopwatch: -1s   1 suites ±0     0 :zzz: ±0    1 files   ±0     0 :x: ±0 

Results for commit 491b29cd. ± Comparison against base commit 4490e9ba.

:recycle: This comment has been updated with latest results.