Configure CORS origins and backend port

backend/app/config.py

@@ -18,7 +18,8 @@ class Settings(BaseSettings):
     mqtt_port: int = 1883
     mqtt_topic: str = "plasttrack/machines/+/events"
     mqtt_client_id: str = "plast-track-backend"
-    frontend_origin: str = "http://localhost:5173"
+    frontend_origin: str | None = None
+    frontend_origins: str = "http://localhost:5173,http://127.0.0.1:5173"
     downtime_check_interval_sec: int = 5
     database_startup_retries: int = 30
     database_startup_retry_delay_sec: float = 2.0
@@ -36,6 +37,13 @@ class Settings(BaseSettings):
             database=self.postgres_db,
         ).render_as_string(hide_password=False)
 
+    @property
+    def cors_allowed_origins(self) -> list[str]:
+        configured_origins = [origin.strip() for origin in self.frontend_origins.split(",") if origin.strip()]
+        if self.frontend_origin:
+            configured_origins.append(self.frontend_origin.strip())
+        return list(dict.fromkeys(configured_origins))
+
 
 @lru_cache
 def get_settings() -> Settings:

backend/app/main.py

@@ -148,7 +148,7 @@ async def lifespan(app: FastAPI):
 app = FastAPI(title=settings.app_name, lifespan=lifespan)
 app.add_middleware(
     CORSMiddleware,
-    allow_origins=[settings.frontend_origin, "http://localhost:5173", "http://127.0.0.1:5173"],
+    allow_origins=settings.cors_allowed_origins,
     allow_credentials=True,
     allow_methods=["*"],
     allow_headers=["*"],