Docker file tuning (#4103)

* Docker file tuning

* Docker images updated to java 10

frameworks/Java/wicket/wicket.dockerfile

@@ -1,13 +1,13 @@
-FROM maven:3.5.3-jdk-8-slim as maven
+FROM maven:3.5.3-jdk-10-slim as maven
 WORKDIR /wicket
 COPY src src
 COPY pom.xml pom.xml
 RUN mvn compile war:war -q
 
-FROM openjdk:8-jdk
+FROM openjdk:10-jdk
 WORKDIR /resin
 RUN curl -sL http://caucho.com/download/resin-4.0.56.tar.gz | tar xz --strip-components=1
 RUN rm -rf webapps/*
 COPY --from=maven /wicket/target/hellowicket-1.0.war webapps/ROOT.war
 COPY resin.xml conf/resin.xml
-CMD ["java", "-jar", "lib/resin.jar", "console"]
+CMD ["java", "-Xms2G", "-Xmx2G", "-server", "-XX:+UseNUMA", "-XX:+UseParallelGC", "-XX:+AggressiveOpts", "-jar", "lib/resin.jar", "console"]