fix: add crossorigin for cors policy (#6)

Author: stedelia

src/main/java/it/gov/pagopa/message/core/configuration/SecurityConfig.java

@@ -0,0 +1,24 @@
+package it.gov.pagopa.message.core.configuration;
+
+import org.springframework.context.annotation.Bean;
+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 SecurityConfig {
+        @Bean
+        public WebMvcConfigurer corsConfigurer() {
+            return new WebMvcConfigurer() {
+                @Override
+                public void addCorsMappings(CorsRegistry registry) {
+                    registry.addMapping("/**")
+                            .allowedOrigins("http://localhost:3000")
+                            .allowedMethods("GET", "POST", "PUT", "DELETE", "OPTIONS")
+                            .allowedHeaders("*")
+                            .allowCredentials(true);
+                }
+            };
+        }
+    }
+