Add package tzdata to the image (#319)
Then users can set the timezone for the container
diff --git a/Dockerfile b/Dockerfile
index 15e5cae..587a61d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -25,7 +25,7 @@
# install dependencies
RUN apk --update add \
- gcc tar libtool zlib jemalloc jemalloc-dev perl \
+ gcc tar libtool zlib jemalloc jemalloc-dev perl tzdata \
ca-certificates wget make musl-dev openssl-dev openssl pcre-dev g++ zlib-dev curl python \
perl-test-longstring perl-list-moreutils perl-http-message geoip-dev dumb-init jq \
&& update-ca-certificates \