make CORS URLs configurable

backend/config.py

@@ -5,6 +5,9 @@ class Settings(BaseSettings):
     # we may want use DSN validators from pydantic.
     # but there are no sqlite validators?
     database_url: str = "sqlite:///./paketshop.db"
+    backend_url: str = "http://localhost:8000"
+    customer_url: str = "http://localhost:3000"
+    worker_url: str = "http://localhost:3002"
 
     class Config:
         env_file = ".env"

backend/main.py

@@ -5,13 +5,14 @@ from fastapi.middleware.cors import CORSMiddleware
 from sqlalchemy.orm import Session
 
 from . import schemas, utils
+from .config import settings
 from .database import SessionLocal, create_database
 
 create_database()
 
 app = FastAPI()
 
-origins = ["http://127.0.0.1:8000", "http://localhost:3000", "http://localhost:3002"]
+origins = [settings.customer_url, settings.worker_url]
 
 
 app.add_middleware(