problem: default java docker is Java 8, may not work with some libs

solution: use Java 13

build.gradle

@@ -22,7 +22,7 @@ plugins {
     id 'jacoco'
 
     id 'org.jetbrains.kotlin.jvm' version '1.3.70'
-    id "com.google.cloud.tools.jib" version "1.3.0"
+    id 'com.google.cloud.tools.jib' version "2.5.0"
     id 'org.springframework.boot' version '2.1.4.RELEASE'
     id 'io.spring.dependency-management' version '1.0.6.RELEASE'
     id 'com.palantir.git-version' version '0.12.2'
@@ -144,6 +144,7 @@ application {
 
 jib {
     from {
+        image = 'openjdk:13'
     }
     to {
         // by default publish as: