hugo, add host's timezone to the container.

Config/HugoExample/docker-compose.example.yml

@@ -12,6 +12,9 @@ services:
     ports:
       - $NGINX_PORT:80  # Production minified files served using NGINX.
       #- $HUGO_PORT:1380 # Development files with drafts served by Hugo Server.
+    volumes:
+      - /etc/timezone:/etc/timezone:ro
+      - /etc/localtime:/etc/localtime:ro
     environment:
       - REPO=$REPO
       - BRANCH=$BRANCH