升级JDK版本，修复JDK8有可能造成的ConcurrentHashMap CPU 100% BUG

Dockerfile

@@ -1,10 +1,10 @@
-FROM maven:3.6.3-jdk-8 AS maven
+FROM maven:3.6.3-jdk-11 AS maven
 USER root
 COPY ./ /tmp/code
 RUN cd /tmp/code && mvn clean package -Dmaven.test.skip=true -Dmaven.javadoc.skip=true
 
 
-FROM java:8
+FROM java:11
 COPY --from=maven /tmp/code/target/*.jar /webdav-teambition.jar
 EXPOSE 8080
 ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/webdav-teambition.jar"]