jsp: merge to main should push to staging

[srl295]

We already push to GCR on a created release.

But we could update a GCR tag when a push to main happens., and have a staging instance setup to automatically (?) redeploy on push.

If we can't do that, we could script Cloud Run to pickup the new push.

[srl295]

@sffc need your help with keys on the GCR side

[sffc]

@srl295 I don't have context on how these tools get deployed. Can you let me know what I need to do? (ok to ping me directly on slack)

[srl295]

Duly pinged