Fixed main class generation in output.

backend/pom.xml

@@ -103,6 +103,17 @@
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-maven-plugin</artifactId>
                 <version>${spring.version}</version>
+                <configuration>
+                    <mainClass>uk.co.neviyn.observationdatabase.ObservationDatabaseApplication</mainClass>
+                    <layout>ZIP</layout>
+                </configuration>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>repackage</goal>
+                        </goals>
+                    </execution>
+                </executions>
             </plugin>
             <plugin>
                 <artifactId>kotlin-maven-plugin</artifactId>

backend/src/main/kotlin/uk/co/neviyn/observationdatabase/ObservationDatabaseApplication.kt

@@ -4,8 +4,11 @@ import org.springframework.boot.autoconfigure.SpringBootApplication
 import org.springframework.boot.runApplication
 
 @SpringBootApplication
-class ObservationDatabaseApplication
-
-fun main(args: Array<String>) {
+class ObservationDatabaseApplication {
+    companion object {
+        @JvmStatic
+        fun main(args: Array<String>) {
             runApplication<ObservationDatabaseApplication>(*args)
+        }
+    }
 }