fix docker image check permission problem

docker/Dockerfile

@@ -1,14 +1,13 @@
 FROM openjdk:11-jre-stretch
 
-ARG SEBSERVER_VERSION
-ENV SEBSERVER_JAR="seb-server-${SEBSERVER_VERSION}.jar"
 ENV SERVER_PORT="8080"
 ENV JMX_PORT=
 ENV JAVA_HEAP_MIN=
 ENV JAVA_HEAP_MAX=
 
-RUN groupadd --system spring && useradd --system --gid spring spring && mkdir /sebserver && chown spring:spring /sebserver
-USER spring:spring
+#just try wihtout user to check if we habe a permission problem
+#RUN groupadd --system spring && useradd --system --gid spring spring && mkdir /sebserver && chown spring:spring /sebserver
+#USER spring:spring
 
 COPY docker/start-sebserver.sh seb-server.jar /sebserver/
 

docker/start-sebserver.sh

@@ -1,3 +1,4 @@
+#!/bin/sh
 if [ "x${JMX_PORT}" = "x" ] ; \
     then exec java \
         -Xms${JAVA_HEAP_MIN} \