[BE] CORS Config 추가

backend/src/main/java/com/woowacourse/momo/config/CorsConfig.java

@@ -0,0 +1,15 @@
+package com.woowacourse.momo.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 CorsConfig implements WebMvcConfigurer {
+
+    @Override
+    public void addCorsMappings(CorsRegistry registry) {
+        registry.addMapping("/**")
+                .allowedOrigins("*");
+    }
+}