add grpc interface and dep remove istio

Dockerfile

@@ -1,6 +1,7 @@
-FROM alpine:3.7
+FROM alpine:3.8
 
 EXPOSE 8080
+EXPOSE 7575
 
 ENV APP_ROOT=/opt/app-root \
     APP_BIN=${APP_ROOT}/bin \
@@ -9,14 +10,16 @@ ENV APP_ROOT=/opt/app-root \
 RUN  mkdir -p ${APP_BIN} ${APP_ROOT} \
      && apk update \
      && apk upgrade \
-     && apk --no-cache add ca-certificates\
+     && apk --no-cache add ca-certificates iputils busybox-extras \
+     && apk add -U tzdata ttf-dejavu\
+     && ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime \
      && adduser -u 1001 -S -G root -g 0 -D -h ${APP_ROOT} -s /sbin/nologin go
 
 COPY ./hicicd ${APP_BIN}
 COPY ./config ${APP_ROOT}/config
 # Drop the root user and make the content of /opt/app-root owned by user 1001
-RUN chown -R 1001:0 ${APP_ROOT}
-
+RUN chown -R 1001:0 ${APP_ROOT} \
+    && chmod u+s /bin/ping
 RUN chmod 755 ${APP_BIN}/hicicd
 
 WORKDIR ${APP_ROOT}