Make feature server URL configurable in UI

Author: kchawlani19

ui/src/pages/feature-views/CurlGeneratorTab.tsx

@@ -20,9 +20,12 @@ const CurlGeneratorTab = ({
   feastObjectQuery,
 }: RegularFeatureViewCustomTabProps) => {
   const data = feastObjectQuery.data as any;
+  const defaultServerUrl =
+    process.env.REACT_APP_FEAST_FEATURE_SERVER_URL ||
+    "http://localhost:6566";
   const [serverUrl, setServerUrl] = useState(() => {
     const savedUrl = localStorage.getItem("feast-feature-server-url");
-    return savedUrl || "http://localhost:6566";
+    return savedUrl || defaultServerUrl;
   });
   const [entityValues, setEntityValues] = useState<Record<string, string>>({});
   const [selectedFeatures, setSelectedFeatures] = useState<