[This](https://github.com/api3dao/signed-api/blob/0bad6fc8dd6aaffaa12cf099ab6bbf7c98d487c8/packages/api/src/handlers.ts#L148) should be consistent with [this](https://github.com/api3dao/signed-api/blob/0bad6fc8dd6aaffaa12cf099ab6bbf7c98d487c8/packages/api/src/handlers.ts#L165). Also, the headers are currently hardcoded for CloudFlare which is not something we want, because the signed API should be deployable everywhere.
