Command for showing info about base images

[joonas-fi]

Let's say project uses fn61/buildkit-golang as base image

That is not resolvable to coming from https://github.com/function61/buildkit-golang

It would be nice to have $ bob info print "homepage" for the base image. We already have:

$ bob info
BASIC DETAILS
+--------------------+-----------------------------------------------------+
| Project name       | turbobob                                            |
| VcKind             | git                                                 |
| Revision ID (full) | dfe3dd40 (dfe3dd401f9983dcb4ae4a97686b8e40e0a6d3a0) |
| Friendly revision  | 20231229_1339_dfe3dd40                              |
+--------------------+-----------------------------------------------------+

BUILDER
+-------------------+----------------------------------------------------------------+
| Name              | default                                                        |
| Uses              | docker://fn61/buildkit-golang:20230219_1208_a7139a03           |      # <-- add after this
| Mount source      |                                                                |
| Mount destination | /workspace                                                     |
| Build command     | build-go-project.sh --directory=cmd/bob/ --binary-basename=bob |
| Publish command   |                                                                |
| Dev command       | bash                                                           |
| Dev ports         | (none)                                                         |
+-------------------+----------------------------------------------------------------+

+-------------------+----+---------+
| CHECKS            | Ok | Reason  |
+-------------------+----+---------+
| ENV(GITHUB_TOKEN) | ✗  | Not set |
| ENV(EVENTHORIZON) | ✗  | Not set |
| License present   | ✓  |         |
| Readme present    | ✓  |         |
+-------------------+----+---------+

The base image homepage is discoverable from image metadata key org.opencontainers.image.url