switched to the msd-java base image, which allows settings the java options...

switched to the msd-java base image, which allows settings the java options via the JAVA_OPTS environment variable

docker/cart/Dockerfile

-FROM java:openjdk-8-alpine
-
-ENV	SERVICE_USER=myuser \
-	SERVICE_UID=10001 \
-	SERVICE_GROUP=mygroup \
-	SERVICE_GID=10001
-
-RUN	addgroup -g ${SERVICE_GID} ${SERVICE_GROUP} && \
-	adduser -g "${SERVICE_NAME} user" -D -H -G ${SERVICE_GROUP} -s /sbin/nologin -u ${SERVICE_UID} ${SERVICE_USER} && \
-	apk add --update libcap && \
-	mkdir /lib64 && \
-	ln -s /usr/lib/jvm/java-1.8-openjdk/jre/lib/amd64/server/libjvm.so /lib/libjvm.so && \
-	ln -s /usr/lib/jvm/java-1.8-openjdk/lib/amd64/jli/libjli.so /lib/libjli.so && \
-	setcap 'cap_net_bind_service=+ep' $(readlink -f $(which java))
+FROM weaveworksdemos/msd-java:latest
 
 WORKDIR /usr/src/app
 COPY *.jar ./app.jar
@@ -34,4 +21,5 @@ LABEL org.label-schema.vendor="Weaveworks" \
   org.label-schema.vcs-ref="${COMMIT}" \
   org.label-schema.schema-version="1.0"
 
-ENTRYPOINT ["java","-Djava.security.egd=file:/dev/urandom","-jar","./app.jar", "--port=80"]
+ENV JAVA_OPTS "-Djava.security.egd=file:/dev/urandom"
+ENTRYPOINT ["/usr/local/bin/java.sh","-jar","./app.jar", "--port=80"]
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