Make financer deployable on a standalone servlet container

src/main/java/de/financer/FinancerApplication.java

@@ -2,12 +2,19 @@ package de.financer;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.builder.SpringApplicationBuilder;
+import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
 import org.springframework.scheduling.annotation.EnableScheduling;
 
 @SpringBootApplication
 @EnableScheduling
-public class FinancerApplication {
+public class FinancerApplication extends SpringBootServletInitializer {
     public static void main(String[] args) {
         SpringApplication.run(FinancerApplication.class);
     }
+
+    @Override
+	protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
+		return application.sources(FinancerApplication.class);
+	}
 }