Include page last modified date in footer for all pages.

[adunkman]

Changes proposed in this pull request:

• Adds the date a page was last modified (based on git commit) to the footer of every page.
• Configures Cloud.gov pages to do a full git clone rather than shallow (to retrieve history).
• The page date is already configured to use git dates.

We're looking to indicate when pages are last modified in updates to the TTS Consulting Handbook.

Build timing

This adds 3-4 seconds to build times, which I think is reasonable for its usefulness.

2024-12-12 16:06:03 INFO [main] Running build for 18f/handbook/add-last-modified-to-footer
2024-12-12 16:06:03 INFO [clone] Cloning into '/tmp/work/site_repo'...
2024-12-12 16:06:04 INFO [clone] Fetching commit details ...
2024-12-12 16:06:04 INFO [clone] commit efaa8b0542cbce8b57a558dbeed66221f95bb545
2024-12-12 16:06:04 INFO [update] Fetching full git history
2024-12-12 16:06:07 INFO [update] From https://github.com/18f/handbook
2024-12-12 16:06:08 INFO [update] * [new tag]           last-jekyll -> last-jekyll
2024-12-12 16:06:08 INFO [update] Already up to date.
2024-12-12 16:06:08 INFO [setup-node] Checking node version specified in .nvmrc

2024-12-11 20:12:02 INFO [main] Running build for 18f/handbook/ttsc-handbook-section-A
2024-12-11 20:12:02 INFO [clone] Cloning into '/tmp/work/site_repo'...
2024-12-11 20:12:03 INFO [clone] Fetching commit details ...
2024-12-11 20:12:03 INFO [clone] commit 3a7873b1aff8b5d98b4f959afb92d43784eb9949
2024-12-11 20:12:03 INFO [update] Fetching full git history
2024-12-11 20:12:06 INFO [update] From https://github.com/18f/handbook
2024-12-11 20:12:06 INFO [update] * [new tag]           last-jekyll -> last-jekyll
2024-12-11 20:12:06 INFO [update] Already up to date.
2024-12-11 20:12:06 INFO [setup-node] Checking node version specified in .nvmrc

Security considerations

None, the git history is public information.

---

[JJediny]

LGTM