Add: UrlMap Repository 구현

src/main/java/be/gyu/urlShortener/repository/UrlMapRepository.java

@@ -0,0 +1,9 @@
+package be.gyu.urlShortener.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import be.gyu.urlShortener.entity.UrlMap;
+
+public interface UrlMapRepository extends JpaRepository<UrlMap,Integer> {
+    
+}