hard-code database url

Author: EasterTheBunny

framework/components/dockercompose/billing_platform_service/docker-compose.yml

@@ -61,9 +61,7 @@ services:
       postgres:
         condition: service_healthy
     restart: on-failure
-    command: ["db", "create-and-migrate", "--url", "${DATABASE_URL}"]
-    environment:
-      DATABASE_URL: postgres://postgres:postgres@postgres:postgres/billing_platform
+    command: ["db", "create-and-migrate", "--url", "postgres://postgres:postgres@postgres:postgres/billing_platform"]
     networks:
       - backend