updated Dockerfile and README.md

* point to the github page rather than gitea, as that is what is linked
  to DockerHub
* mention `hugo-extended` in the list
* inform about the image being regularly rebuilt

Dockerfile

@@ -6,7 +6,7 @@ ARG BUILD_DATE
 ARG VCS_REF
 
 LABEL org.label-schema.build-date=$BUILD_DATE \
-      org.label-schema.vcs-url="https://git.dotya.ml/wanderer/docker-archlinux-hugo.git" \
+      org.label-schema.vcs-url="https://github.com/wULLSnpAXbWZGYDYyhWTKKspEQoaYxXyhoisqHf/docker-archlinux-hugo" \
       org.label-schema.vcs-ref=$VCS_REF
 
 RUN pacman -Syu --noconfirm --needed wget tar git \

README.md

@@ -1,12 +1,14 @@
 # docker-archlinux-hugo [![Build Status](https://drone.dotya.ml/api/badges/wanderer/docker-archlinux-hugo/status.svg?ref=refs/heads/master)](https://drone.dotya.ml/wanderer/docker-archlinux-hugo)
 
 This repository provides the Dockerfile to create a Docker image used for web developent using [Hugo](https://gohugo.io) website building framework.
+The image is rebuilt approximately every hour to ensure it always has the latest packages.
 
 ## What you get
 * updated Arch Linux [base image](https://hub.docker.com/_/archlinux)
 * wget
 * tar
 * git
+* hugo-extended (latest version from [GitHub](https://github.com/gohugoio/hugo/releases))
 
 ## Purpose
 * web development using `Hugo` upon fresh package base