feat(Docker): add Secrets, Compose v2, Supply Chain Security, Podman (#…

…1301)

* chore(Docker): compose v2 & networking update

- Updates Docker Compose references to use v2 `docker compose` command
- Change ICC recommendation to use network policies  instead of disabling

Signed-off-by: otkd <[email protected]>

* feat(Docker): add Docker Secrets rule

- Following existing syntax adds Rule #13 covering Docker Secrets

Signed-off-by: otkd <[email protected]>

* Apply suggestions from code review

Co-authored-by: Shlomo Zalman Heigh <[email protected]>

* feat(Docker): add Supply Chain Security & Podman

- Merges the linting and container scanning section into a single rule
- Fixes issue in proposed solution in Rule 10 doesn’t actually help implement the suggestion
- Expand rootless mode
- Add high level practices covering Docker supply chain security
- Add Podman as an alternative to Docker for secure defaults

Signed-off-by: otkd <[email protected]>

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Signed-off-by: otkd <[email protected]>
Co-authored-by: Shlomo Zalman Heigh <[email protected]>