Error handeling.

src/services/DeckService.js

@@ -1,6 +1,10 @@
 export async function getHand() {
   const response = await fetch('http://localhost:8080/api/deck/hand');
-  return await response.json();
+  if (response.status >= 200 && response.status <= 299) {
+    return  await response.json();
+  } else {
+    throw Error(response.statusText);
+  }
 }
 
 export async function sortHand(hand) {
@@ -9,12 +13,15 @@ export async function sortHand(hand) {
     headers: {'Content-Type': 'application/json'},
     body: JSON.stringify(hand)
   })
-  return await response.json();
+  if (response.status >= 200 && response.status <= 299) {
+    return  await response.json();
+  } else {
+    throw Error(response.statusText);
+  }
 }
 
 export async function resetDeck() {
-  const response = await fetch(`http://localhost:8080/api/deck:reset`, {
+  return  await fetch(`http://localhost:8080/api/deck:reset`, {
     method: 'PUT'
   })
-  await response;
 }