単独で実行可能な Ktor アプリケーション の jar を生成する ref: https://qiita.com/lasta/items/2c25ae5a875ba8da4f8a

file0.txt

java -jar yourapplication.jar

file1.java

task fatJar(type: Jar) {
    manifest {
        attributes "Implementation-Title": project.name,
                "Implementation-Version": version,
                "Main-Class": mainClassName
    }
    baseName = project.name
    from { configurations.compile.collect { it.isDirectory() ? it : zipTree(it) } }
    exclude "META-INF/*.RSA", "META-INF/*.SF", "META-INF/*.DSA"
    with jar
}

file2.txt

gradle fatJar

file3.txt

java -jar ${project.name}-${version}.jar