Update reference to Source Interface /journalist-key route

[DrGFreeman]

Status

Ready for review.

Description of Changes

• Description:

Update instructions to get GPG key to use the new /public-key route instead of /journalist-key which will be deprecated.

• Fixes Source Interface /journalist-key route is being deprecated, update references to /public-key #111

Testing

• Verify the instructions in the Retrieve GPG Public Keys section of Rebuilding an Admin Workstation USB refer to /public-key instead of /journalist-key, specifically in the curl command of the following block:

  cd ~/Persistent/securedrop/install_files/ansible-base
  curl http://$(cat app-source-ths)/public-key > SecureDrop.asc
  gpg --import SecureDrop.asc
  

Release

• Synchronize with the release of the changes in Rename journalist key routes securedrop#5651.

Checklist (Optional)

• Doc linting (make docs-lint) passed locally
• Doc link linting (make docs-linkcheck) passed
• You have previewed (make docs) docs at http://localhost:8000

[DrGFreeman]

The proposed change updates the URL to that of the new route and is not backwards compatible.

I am not familiar with the release process and synchronization between the docs and application however I can see a potential issue where an admin of an instance that does not yet implement the new route tries to follow the instructions and fails to download the key.

An alternative would be to leave the /journalist-key route and add the -L option to the curl command so that it follows the redirection. This would make the instructions compatible with instances that implement the new /public-key route (and redirection of the /journalist-key route) and those that don't.

@eloquence, what do you think? I can easily make the change to the above alternative.

[zenmonkeykstop]

LGTM based on visual review, will merge once freedomofpress/securedrop#5651 has been re-reviewed and merged.