init auto DCO signoff and check

[alexvpickering]

Description

adds check for DCO signoff and automagic so you don't need it every time

Details

URL to issue

hms-dbmi-cellenics/issues#6

Link to staging deployment URL (or set N/A)

N/A

Links to any PRs or resources related to this PR

hms-dbmi-cellenics/api#460
hms-dbmi-cellenics/pipeline#314
hms-dbmi-cellenics/ui#849
hms-dbmi-cellenics/iac#553

Integration test branch

master

Merge checklist

Your changes will be ready for merging after all of the steps below have been completed.

Code updates

Have best practices and ongoing refactors being observed in this PR

• Migrated any selector / reducer used to the new format.

Manual/unit testing

• Tested changes using InfraMock locally or no tests required for change, e.g. Kubernetes chart updates.
• Validated that current unit tests for code work as expected and are sufficient for code coverage or no unit tests required for change, e.g. documentation update.
• Unit tests written or no unit tests required for change, e.g. documentation update.

Integration testing

You must check the box below to run integration tests on the latest commit on your PR branch.
Integration tests have to pass before the PR can be merged. Without checking the box, your PR
will not pass the required status checks for merging.

• Started end-to-end tests on the latest commit.

Documentation updates

• Relevant Github READMEs updated or no GitHub README updates required.
• Relevant Wiki pages created/updated or no Wiki updates required.

Optional

• Staging environment is unstaged before merging.
• Photo of a cute animal attached to this PR.