fix: pass OSRM_URL from root .env into estore container

env_file only reads estore/.env; the root .env value wasn't reaching
the container. Wiring it through compose environment: fixes this.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docker-compose.yml

@@ -75,6 +75,8 @@ services:
     expose:
       - "3000"
     env_file: ./estore/.env
+    environment:
+      OSRM_URL: ${OSRM_URL}   # injected from root .env; overrides estore/.env
     volumes:
       - ./estore/data:/app/data
     restart: unless-stopped