fetch and filter on event categories

web/src/components/events/EventHeader.tsx

@@ -14,6 +14,10 @@ export const EventHeader = ({ event }: { event: EventFragment }) => {
           <div>Ordinær pris: {event.priceRegular}</div>
           <div>Studentpris: {event.priceStudent}</div>
           <div>Medlemspris: {event.priceMember}</div>
+          <div>
+            Kategorier:{" "}
+            {event.categories && event.categories.map((x) => x.name).join(", ")}
+          </div>
         </div>
       </div>
       <div className={styles.image}>