fix dockerfile

Author: BarathArivazhagan

airtel-store-service/Dockerfile

@@ -1,6 +1,6 @@
 FROM openjdk:8-jdk-alpine
-RUN adduser demo
+RUN adduser -D demo
 USER demo
 VOLUME /tmp
 ADD target/airtel-store-service-*.jar app.jar
-ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
+ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]