package com.pm.server;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.context.web.SpringBootServletInitializer;

@SpringBootApplication
public class PmServerApplication extends SpringBootServletInitializer {

	public static void main(String[] args) {
		SpringApplication.run(PmServerApplication.class, args);
	}

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
        return application.sources(PmServerApplication.class);
    }

}

package com.pm.server;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.context.web.SpringBootServletInitializer;

@SpringBootApplication
public class PmServerApplication extends SpringBootServletInitializer {

	public static void main(String[] args) {
		SpringApplication.run(PmServerApplication.class, args);
	}

	@Override
	protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
		return application.sources(PmServerApplication.class);
	}

}

Correct indentation for application configuration