Update karaf-maven-plugin:dockerfile goal to use adoptopenjdk:11-jre-hotspot base image
diff --git a/tooling/karaf-maven-plugin/src/main/java/org/apache/karaf/tooling/DockerfileMojo.java b/tooling/karaf-maven-plugin/src/main/java/org/apache/karaf/tooling/DockerfileMojo.java
index 8b8de7b..556ab20 100644
--- a/tooling/karaf-maven-plugin/src/main/java/org/apache/karaf/tooling/DockerfileMojo.java
+++ b/tooling/karaf-maven-plugin/src/main/java/org/apache/karaf/tooling/DockerfileMojo.java
@@ -46,7 +46,7 @@
         File dockerFile = new File(destDir, "Dockerfile");
         try {
             StringBuilder buffer = new StringBuilder();
-            buffer.append("FROM openjdk:8-jre").append("\n");
+            buffer.append("FROM adoptopenjdk:11-jre-hotspot").append("\n");
             buffer.append("ENV KARAF_INSTALL_PATH /opt").append("\n");
             buffer.append("ENV KARAF_HOME $KARAF_INSTALL_PATH/apache-karaf").append("\n");
             buffer.append("ENV KARAF_EXEC exec").append("\n");