Add Docker support.

Author: gregturn

5-reactive/Dockerfile

@@ -11,4 +11,3 @@ COPY --from=builder application/snapshot-dependencies/ ./
 COPY --from=builder application/resources/ ./
 COPY --from=builder application/application/ ./
 ENTRYPOINT ["java", "org.springframework.boot.loader.JarLauncher"]
-

5-reactive/pom.xml

@@ -76,15 +76,18 @@
 
     <build>
         <plugins>
+            <!-- tag::docker[] -->
             <plugin>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-maven-plugin</artifactId>
-                <!-- tag::docker[] -->
                 <configuration>
                     <layout>LAYERED_JAR</layout>
                 </configuration>
-                <!-- end::docker[] -->
+                <configuration>
+                    <layout>LAYERED_JAR</layout>
+                </configuration>
             </plugin>
+            <!-- end::docker[] -->
         </plugins>
     </build>