Merge pull request #12 from microservices-demo/build/user

Added user to dockerfile.

docker/catalogue/Dockerfile-release

@@ -1,10 +1,25 @@
-FROM busybox:1
+FROM alpine:3.4
+
+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
 
 WORKDIR /
 EXPOSE 80
 COPY app /
 COPY images/ /images/
 
+RUN chmod +x /app && \
+ chown -R ${SERVICE_USER}:${SERVICE_GROUP} /app /images && \
+ setcap 'cap_net_bind_service=+ep' /app
+
+USER ${SERVICE_USER}
+
 ARG BUILD_DATE
 ARG BUILD_VERSION
 ARG COMMIT