fix: use correct docker tag

[anbraten]

closes #40

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• Add an issue number if this PR can fix or relates to an issue.
• Add a changeset if needed with pnpm changeset

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[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 0678460d2494d872bad2c64d25d76c1c696387d4

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

| Name | Type | | ------------------ | ----- | | @lagoss/serverless | Patch | | @lagoss/dashboard | Patch |

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