Quarkus todo fails to launch in docker container

[FrankBergemann]

Hi,
Thank you for maintaining this nice todo application. However, I noticed an error when trying to deploy and run quarkus todo app in a docker container on Win10. As per comment in the Dockerfile, I issued the following commands:
`mvn package

docker build -f src/main/docker/Dockerfile.jvm -t quarkus/todo-backend-jvm .

docker run -i --rm -p 8080:8080 quarkus/todo-backend-jvm`

The last command fails with the following error messages:

PS C:\Users\BERGEF\onedrive\git\todo-app> docker run -i --rm -p 8080:8080 quarkus/todo-backend-jvm exec java -Dquarkus.http.host=0.0.0.0 -javaagent:/opt/agent-bond/agent-bond.jar=jolokia{{host=0.0.0.0}},jmx_exporter{{9779:/opt/agent-bond/jmx_exporter_config.yml}} -XX:+UseParallelGC -XX:GCTimeRatio=4 -XX:AdaptiveSizePolicyWeight=90 -XX:MinHeapFreeRatio=20 -XX:MaxHeapFreeRatio=40 -XX:+ExitOnOutOfMemoryError -cp . -jar /deployments/app.jar I> No access restrictor found, access to any MBean is allowed Jolokia: Agent started with URL http://172.17.0.2:8778/jolokia/ Exception in thread "main" java.lang.ExceptionInInitializerError at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at java.lang.Class.newInstance(Class.java:442) at io.quarkus.runtime.Quarkus.run(Quarkus.java:65) at io.quarkus.runtime.Quarkus.run(Quarkus.java:42) at io.quarkus.runtime.Quarkus.run(Quarkus.java:119) at io.quarkus.runner.GeneratedMain.main(GeneratedMain.zig:29) Caused by: java.lang.RuntimeException: Failed to start quarkus at io.quarkus.runner.ApplicationImpl.<clinit>(ApplicationImpl.zig:368) ... 9 more Caused by: java.lang.UnsupportedClassVersionError: io/quarkus/sample/TodoResource has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:756) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:468) at java.net.URLClassLoader.access$100(URLClassLoader.java:74) at java.net.URLClassLoader$1.run(URLClassLoader.java:369) at java.net.URLClassLoader$1.run(URLClassLoader.java:363) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:362) at java.lang.ClassLoader.loadClass(ClassLoader.java:418) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352) at java.lang.ClassLoader.loadClass(ClassLoader.java:351) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:348) at io.quarkus.deployment.steps.HibernateValidatorProcessor$build74467542.deploy_0(HibernateValidatorProcessor$build74467542.zig:75) at io.quarkus.deployment.steps.HibernateValidatorProcessor$build74467542.deploy(HibernateValidatorProcessor$build74467542.zig:40) at io.quarkus.runner.ApplicationImpl.<clinit>(ApplicationImpl.zig:260) ... 9 more