Ensure backend tasks depend on frontend build completion

backend/build.gradle.kts

@@ -44,6 +44,10 @@ dependencies {
 
 }
 
+tasks.compileJava {
+    dependsOn(":frontend:npmBuild")
+}
+
 tasks.withType<Test> {
     useJUnitPlatform()
 }
@@ -60,6 +64,7 @@ tasks.processResources {
 
 tasks.register<Copy>("includeFrontend") {
     description = "Copy the built frontend to the Spring Boot static resources directory"
+    dependsOn(":frontend:npmBuild")
     from("${project.rootDir}/frontend/dist")
     into(layout.buildDirectory.dir("resources/main/static"))
     doNotTrackState("Cannot reliably track state in the static directory")