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Outerbounds

Hey team! :blob_excited:
The official Metaflow-on-GCP setup references this metadata service image:

```jackieob/metadata_service:gcp.rc1```
<https://github.com/outerbounds/metaflow-tools/blob/d24572c0a1610410ff586f1cd87312edc1c34cf1/gcp/terraform/variables.tf#L23|link to code>

Is this image still maintained? I was looking for the source repository of this image and it appears to be <https://github.com/jackie-ob/metaflow-service|this one>, but most of the commits are from years ago.
We are trying to take advantage of the newly released `spin` feature, but it looks like that requires a newer version of the metadata sevrice.

I don't think that image is maintained anymore. The official images should work fine when deploying to GCP as well judging from the diff in the repo.

so one of
• `public.ecr.aws/outerbounds/metaflow_metadata_service:2.5.0`
•  `netflixoss/metaflow_metadata_service:v2.5.0` 

I'll do a sweep today on the repo to make sure all the templates are using the latest image