Testing Done:
Dropped `hasl.zip` in the `archives/` directory and verified it showed up in the final container. The hasl docs are going to be in another review request.
Also built with the `archives/` directory empty and verified it ran without issue.
Reviewed at https://reviews.imfreedom.org/r/2456/
FROMdocker.io/nginx:alpineASextractor
COPYarchives//archives/
# alpine xargs doesn't have long flags, -r is don't run if input is empty, and