feat: CORS 설정 추가

- Swaager UI , api 테스트 가능하도록 하기 위해 CORS 설정 추가

backend/src/main/java/com/woowacourse/friendogly/config/WebConfig.java

@@ -0,0 +1,18 @@
+package com.woowacourse.friendogly.config;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.config.annotation.CorsRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+@Configuration
+public class WebConfig implements WebMvcConfigurer {
+
+    @Override
+    public void addCorsMappings(CorsRegistry registry) {
+        registry.addMapping("/**")
+                .allowedOrigins("http://localhost")
+                .allowedMethods("GET", "POST", "PUT", "PATCH", "DELETE")
+                .allowedHeaders("*")
+                .allowCredentials(true);
+    }
+}