/console/login endpoint shows "Invalid admin-secret passed from CLI" even when the correct secret was passed

### Version Information

Server Version: 2.1.1
CLI Version (for CLI related issue): 2.1.1

### Environment

- Server running in Docker on `hasura/graphql-engine:v2.1.1` image
- Console running in Docker on image slightly customized from `alpine:3.15` image

### What is the expected behaviour?

Visiting `http://localhost:9695/console/login` should show me a login success message, or redirect me to the logged-in landing page.

### Keywords

"Invalid admin-secret passed from CLI"

### What is the current behaviour?