add

backend/src/main/java/com/car/config/WebConfig.java

@@ -0,0 +1,17 @@
+package com.car.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("/**")
+                .allowedOriginPatterns("*")
+                .allowedMethods("*")
+                .allowedHeaders("*")
+                .allowCredentials(true);
+    }
+}