Add jar build configuration

build.gradle.kts

@@ -26,4 +26,14 @@ tasks.withType<KotlinCompile> {
 
 application {
     mainClass.set("MainKt")
+}
+
+tasks.jar {
+    manifest {
+        attributes["Main-Class"] = "MainKt"
+    }
+    configurations["compileClasspath"].forEach { file: File ->
+        from(zipTree(file.absoluteFile))
+    }
+    duplicatesStrategy = DuplicatesStrategy.INCLUDE
 }