docker-service-discovery/openspec/changes/archive/2026-03-31-backend-url-env-var/specs/configurable-backend-url/spec.md

ADDED Requirements

Requirement: Backend URL is configured via environment variable

The frontend application SHALL use the URL defined in the REACT_APP_BACKEND_URL environment variable to make API calls to the backend.

Scenario: Environment variable is set

• WHEN the REACT_APP_BACKEND_URL environment variable is set to "http://api.example.com"
• THEN the application SHALL make API calls to "http://api.example.com".

Scenario: Environment variable is not set

• WHEN the REACT_APP_BACKEND_URL environment variable is not set
• THEN the application SHALL make API calls to "http://localhost:3001".