Return error status

backend/app/main.py

@@ -16,8 +16,10 @@
 
 import time
 
-from fastapi import FastAPI
+import requests
+from fastapi import FastAPI, status
 from fastapi.middleware.cors import CORSMiddleware
+from fastapi.responses import JSONResponse
 
 from app.services.builds import build_history
 from app.services.menu import build_menu
@@ -76,4 +78,10 @@ def price_for_item(item: str):
 
 @app.get("/builds")
 def builds():
-    return build_history()
+    try:
+        return build_history()
+    except (requests.RequestException, ValueError):
+        return JSONResponse(
+            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
+            content={"builds": [], "error": "jenkins_unavailable"},
+        )