install tzdata package everywhere.

fixes #78
fixes

docker/Dockerfile

@@ -32,7 +32,7 @@ WORKDIR /scrutiny
 ENV PATH="/scrutiny/bin:${PATH}"
 ENV INFLUXD_CONFIG_PATH=/scrutiny/influxdb
 
-RUN apt-get update && apt-get install -y cron smartmontools=7.0-0ubuntu1~ubuntu18.04.1 ca-certificates curl && update-ca-certificates
+RUN apt-get update && apt-get install -y cron smartmontools=7.0-0ubuntu1~ubuntu18.04.1 ca-certificates curl tzdata && update-ca-certificates
 
 ADD https://github.com/just-containers/s6-overlay/releases/download/v1.21.8.0/s6-overlay-amd64.tar.gz /tmp/
 RUN tar xzf /tmp/s6-overlay-amd64.tar.gz -C /

docker/Dockerfile.collector

@@ -14,7 +14,7 @@ FROM ubuntu:bionic as runtime
 WORKDIR /scrutiny
 ENV PATH="/scrutiny/bin:${PATH}"
 
-RUN apt-get update && apt-get install -y cron smartmontools=7.0-0ubuntu1~ubuntu18.04.1 ca-certificates && update-ca-certificates
+RUN apt-get update && apt-get install -y cron smartmontools=7.0-0ubuntu1~ubuntu18.04.1 ca-certificates tzdata && update-ca-certificates
 
 COPY /docker/entrypoint-collector.sh /entrypoint-collector.sh
 COPY /rootfs/etc/cron.d/scrutiny /etc/cron.d/scrutiny

docker/Dockerfile.web

@@ -29,7 +29,7 @@ EXPOSE 8080
 WORKDIR /scrutiny
 ENV PATH="/scrutiny/bin:${PATH}"
 
-RUN apt-get update && apt-get install -y ca-certificates curl && update-ca-certificates
+RUN apt-get update && apt-get install -y ca-certificates curl tzdata && update-ca-certificates
 
 COPY --from=backendbuild /go/src/github.com/analogj/scrutiny/scrutiny /scrutiny/bin/
 COPY --from=frontendbuild /scrutiny/dist /scrutiny/web