Add engines block on master branch for force prod redeployment

[nichhk]

Fixes #1194

• Up to date with master branch
• Branch name follows guidelines
• All PR Status checks are successful
• Peer reviewed and approved

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Adding the engines is a no-op; it's essentially adding documentation (see #1189). I already merged this into dev, so I'm cherry-picking this commit from dev into master. Any change in client/ should trigger a prod deployment.

But it turns out that the prod deployment on master is broken too, so we need to update those with the fixes we brought into dev (see #1193).

[ExperimentsInHonesty]

Not 100% sure, but willing to try this to see if it fixing current problem with v2 showing instead of v1