Add KARAF_EXEC env in Dockerfile
@@ -21,6 +21,7 @@ FROM openjdk:8-jre
# Karaf environment variables
ENV KARAF_INSTALL_PATH /opt
ENV KARAF_HOME $KARAF_INSTALL_PATH/apache-karaf
+ENV KARAF_EXEC exec
ENV PATH $PATH:$KARAF_HOME/bin
#WORKDIR $KARAF_HOME
