Add support for independent Tomcat deployment

Signed-off-by: Pekka Helenius <fincer89@hotmail.com>

bookstore/pom.xml

@@ -1,5 +1,6 @@
 <?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"
+<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>
 	<packaging>war</packaging>
@@ -7,7 +8,7 @@
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
 		<version>2.2.4.RELEASE</version>
-		<relativePath/> <!-- lookup parent from repository -->
+		<relativePath /> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>com.fjordtek.bookstore</groupId>
 	<artifactId>Bookstore</artifactId>
@@ -29,12 +30,12 @@
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-web</artifactId>
 		</dependency>
-		
+
 		<dependency>
-		    <groupId>org.springframework.boot</groupId>
-		     <artifactId>spring-boot-starter-thymeleaf</artifactId>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-thymeleaf</artifactId>
 		</dependency>
-    
+
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-test</artifactId>

bookstore/src/main/java/com/fjordtek/bookstore/BookstoreApplication.java

@@ -2,9 +2,10 @@ package com.fjordtek.bookstore;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
 
 @SpringBootApplication
-public class BookstoreApplication {
+public class BookstoreApplication extends SpringBootServletInitializer {
 
 	public static void main(String[] args) {
 		SpringApplication.run(BookstoreApplication.class, args);