Spring Boot App with Maven and Wildly (26.1.1) - PAGE NOT FOUND Error - spring

Question

I have created a Spring Boot application. I use WildFly as the application server - this is what I want to use to run the application.
These are the Java and Maven related files I have:
#RestController
public class MyController {
#Autowired
private Student student;
#GetMapping(value="/index")
public String sayHello() {
return "Hello";
}
}
Of course I have the main method with the Spring Boot related annotations:
#SpringBootApplication
public class SpringBootTestApplication {
public static void main(String[] args) {
SpringApplication.run(SpringBootTestApplication.class, args);
}
}
I have the Maven file like this:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.7.2</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<groupId>com.globalsoftwaresupport</groupId>
<artifactId>spring-boot-test</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>spring-boot-test</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>17</java.version>
<deploy.jboss.host>127.0.0.1</deploy.jboss.host>
<deploy.jboss.port>9990</deploy.jboss.port>
<deploy.jboss.username>balazs</deploy.jboss.username>
<deploy.jboss.password>balazs1990</deploy.jboss.password>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<configuration>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
<plugin>
<groupId>org.wildfly.plugins</groupId>
<artifactId>wildfly-maven-plugin</artifactId>
<version>2.0.2.Final</version>
<executions>
<execution>
<phase>install</phase>
<goals>
<goal>deploy</goal>
</goals>
</execution>
</executions>
<configuration>
<filename>${project.build.finalName}.war</filename>
<hostname>${deploy.jboss.host}</hostname>
<port>${deploy.jboss.port}</port>
<username>${deploy.jboss.username}</username>
<password>${deploy.jboss.password}</password>
</configuration>
</plugin>
</plugins>
</build>
<packaging>war</packaging>
When I build the project with mvn clean install then Maven compiles and deployed the app to the Wildfly server.
So far so good I have the application on the server. First of all:
1.) is it not a problem that I have the SNAPSHOT present in the context root?
2.) another problem is that I can not run the application - I start WildFly server in Eclipse and I check the context root.
Can you help me why is this happening? Thank you for your help in advance!