refactor:[kakao-tech-campus-2nd-step3#84]- refact Security

cors 변경

src/main/java/com/helpmeCookies/global/config/WebConfig.java

@@ -12,7 +12,7 @@ public void addCorsMappings(CorsRegistry registry) {
 		registry.addMapping("/**")
 			.allowedOrigins("http://1.618.s3-website.ap-northeast-2.amazonaws.com", "http://localhost:3000")
 			.allowedMethods("GET", "POST", "PUT", "DELETE", "OPTIONS")
-			.allowedHeaders("Authorization", "Content-Type", "X-Requested-With", "accept", "Origin", "Access-Control-Request-Method", "Access-Control-Request-Headers")
+			.allowedHeaders("Authorization", "Content-Type", "X-Requested-With", "accept", "Origin", "Access-Control-Request-Method", "Access-Control-Request-Headers","cross-control-allow-origin")
 			.allowCredentials(true);
 	}
 }