Tomcat war deployment gives 404 when using annotations instead of web.xml - spring

Question

I am trying to learn Spring framework. When I use Spring annotation for configuration instead of web.xml and deploy war file on Tomcat in Docker container, it gives 404 error. After switching to web.xml and servlet.xml configuration, it gives no error.
My config file:
package com.janfranco.mvctutorial.config;
...
#Configuration
#EnableWebMvc
#ComponentScan
public class AppConfig implements WebMvcConfigurer {
#Bean
public ViewResolver viewResolver() {
InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
viewResolver.setPrefix("/WEB-INF/view/");
viewResolver.setSuffix(".jsp");
return viewResolver;
}
#Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");
}
}
My servlet file:
package com.janfranco.mvctutorial.config;
...
public class DispatcherServletInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
#Override
protected Class<?>[] getRootConfigClasses() {
return null;
}
#Override
protected Class<?>[] getServletConfigClasses() {
return new Class[] { AppConfig.class };
}
#Override
protected String[] getServletMappings() {
return new String[] { "/" };
}
}
I use Maven for management. Here is my Dockerfile:
FROM tomcat:8.0.20-jre8
COPY target/mvctutorial.war /usr/local/tomcat/webapps/
How can I use annotations and get rid of xml configs?
Edit:
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
<display-name>mvctutorial</display-name>
<absolute-ordering />
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>