feat: allow configuring api prefix

[dbarrosop]

Fixes #429

Checklist

• [x] No breaking changes
• [x] Tests pass
• [x] New features have new tests
• [x] Documentation is updated

Breaking changes

Avoid breaking changes and regressions. If you feel it is unavoidable, make it explicit in your PR comment so we can review it and see how to handle it.

Tests

• please make sure your changes pass the current tests (Use the make test or the make watch command).
• if you are introducing a new feature, please write as much tests as possible.

Documentation

Please make sure the documentation is updated accordingly, in particular:

• Workflows. Workflows are Mermaid sequence diagrams
• Schema. The schema in a Mermaid ER diagram
• Environment variables. Please adjust the .env.example file accordingly
• OpenApi specifications. We are using inline JSDoc annotations

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: f6c72bcfb4e637a46cf87dd708b0944af49e13b8

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

This PR includes changesets to release 1 package

| Name | Type | | ----------- | ----- | | hasura-auth | Minor |

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