Fixes for Slingshot Dockerfile and other various minor bugs#25

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yutuyt01 wants to merge 4 commits intomasterfrom

slingshot-docker

Commits on May 24, 2024

docker key change
yutuyt01
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Commits on May 28, 2024

os.sep change for cross-os
yutuyt01
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Commits on May 30, 2024

patchwork fix for slingshot dockerfile and changed clusters=1 to be consistent with other operation
yutuyt01
committed

Commits on Jun 11, 2024

included pyyaml in requirements as it was not present previously
yutuyt01
committed