Format code

build.gradle.kts

@@ -4,6 +4,7 @@ plugins {
     id("org.springframework.boot") version "3.4.4"
     id("io.spring.dependency-management") version "1.1.7"
     id("com.google.cloud.tools.jib") version "3.4.5"
+    id("com.diffplug.spotless") version "7.0.3"
 }
 
 group = "com.pischule"
@@ -48,3 +49,9 @@ kotlin {
 tasks.withType<Test> {
     useJUnitPlatform()
 }
+
+spotless {
+  kotlin {
+    ktfmt("0.54").kotlinlangStyle()
+  }
+}