update docker image to use eclipse-temurin

Use same as proposed here:

cBioPortal/cbioportal#9890

Dockerfile

@@ -4,12 +4,12 @@
 # version 3, or (at your option) any later version.
 #
 
-FROM maven:3.6 as build
+FROM maven:3-eclipse-temurin-11 as build
 COPY $PWD /session-service
 WORKDIR /session-service
 RUN mvn package -DskipTests -Dpackaging.type=jar
 
-FROM openjdk:11-jre-slim
+FROM eclipse-temurin:11
 # copy over target/session_service-x.y.z.jar ignore *-model.jar, that jar is
 # used by cbioportal/cbioportal to import the models
 COPY --from=build /session-service/target/*[0-9].jar /app.war