add redirection

src/main/java/edu/neu/neumall/configure/WebMvcConfig.java

@@ -4,6 +4,7 @@ import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
 import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
+import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
 import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
 
 import java.nio.file.Path;
@@ -21,6 +22,11 @@ public class WebMvcConfig implements WebMvcConfigurer {
         registry.addResourceHandler("/img/**").addResourceLocations("file:/" + location.toString() + "\\");
     }
 
+    @Override
+    public void addViewControllers(ViewControllerRegistry registry) {
+        registry.addRedirectViewController("/", "/product");
+    }
+
     @Bean
     public BCryptPasswordEncoder passwordEncoder() {
         return new BCryptPasswordEncoder();