Make it easier to run Openverse from an offline media

[dhruvkb]

Fixes

Fixes #4478 by @dhruvkb

Description

This PR makes Openverse easier to install from an offline media. It includes the following changes

1. recipes to dump non-Openverse images to .tar.gz files that can be loaded on the destination

Testing Instructions

For change no. 1

• Run just docker/save. See that a bunch of images have been placed in the docker/images/ directory.
• Delete all the images that were dumped.
• Run just docker/load. See that all the images have come back.

Checklist

• [x] My pull request has a descriptive title (not a vague title likeUpdate index.md).
• [x] My pull request targets the default branch of the repository (main) or a parent feature branch.
• [x] My commit messages follow best practices.
• [x] My code follows the established code style of the repository.
• [ ] I added or updated tests for the changes I made (if applicable).
• [x] I added or updated documentation (if applicable).
• [x] I tried running the project locally and verified that there are no visible errors.
• [ ] I ran the DAG documentation generator (just catalog/generate-docs for catalog PRs) or the media properties generator (just catalog/generate-docs media-props for the catalog or just api/generate-docs for the API) where applicable.

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