Add war and Liberty configuration

pom.xml

@@ -10,7 +10,8 @@
     <artifactId>spring-boot-starter-parent</artifactId>
     <version>3.1.0</version>
   </parent>
-  <name>petclinic</name>
+  <name>liberty-spring-petclinic</name>
+  <packaging>war</packaging>
 
   <properties>
 
@@ -121,6 +122,7 @@
   </dependencies>
 
   <build>
+    <finalName>liberty-${project.artifactId}</finalName>
     <plugins>
       <plugin>
         <groupId>io.spring.javaformat</groupId>
@@ -243,6 +245,19 @@
           <failOnUnableToExtractRepoInfo>false</failOnUnableToExtractRepoInfo>
         </configuration>
       </plugin>
+      <plugin>
+    <groupId>io.openliberty.tools</groupId>
+    <artifactId>liberty-maven-plugin</artifactId>
+    <version>3.8.1</version>
+    <configuration>
+        <runtimeArtifact>
+            <groupId>io.openliberty</groupId>
+            <artifactId>openliberty-webProfile10</artifactId>
+            <version>23.0.0.5</version>
+            <type>zip</type>
+        </runtimeArtifact>
+    </configuration>
+</plugin>
 
     </plugins>
   </build>

src/main/java/org/springframework/samples/petclinic/PetClinicServletInitializer.java

@@ -0,0 +1,23 @@
+/*******************************************************************************
+ * Copyright (c) 2023 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License 2.0
+ * which accompanies this distribution, and is available at
+ * https://www.eclipse.org/legal/epl-2.0/
+ * 
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ *******************************************************************************/
+package org.springframework.samples.petclinic;
+
+import org.springframework.boot.builder.SpringApplicationBuilder;
+import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
+
+public class PetClinicServletInitializer extends SpringBootServletInitializer {
+
+	@Override
+	protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
+		return application.sources(PetClinicApplication.class);
+	}
+
+}