Why is the spring project not taking off?

Question

Spring

Hello.
I continue to master Spring Security I
took https://www.mkyong.com/spring-security/spring-secu...
as a basis. I tried to create a project from scratch,
changed the package name
ru.examples.spring.
web.xml appeared
As a result, Tomcat returns an error and nothing more
HTTP Status 404 - /
type Status report
message /
description The requested resource is not available.
What is the problem and how to solve it?
the project posted on github mode public
https://github.com/github-030/spring_examples.git