Use hugo extended

Dockerfile

@@ -7,10 +7,10 @@ RUN apt-get -qq update \
 	&& DEBIAN_FRONTEND=noninteractive apt-get -qq install -y --no-install-recommends python-pygments git ca-certificates asciidoctor \
 	&& rm -rf /var/lib/apt/lists/*
 
-ENV HUGO_VERSION 0.53
-ENV HUGO_BINARY hugo_${HUGO_VERSION}_Linux-64bit.deb
+ENV HUGO_VERSION 0.54.0
+ENV HUGO_BINARY hugo_extended_${HUGO_VERSION}_Linux-64bit.deb
 
-ADD https://github.com/spf13/hugo/releases/download/v${HUGO_VERSION}/${HUGO_BINARY} /tmp/hugo.deb
+ADD https://github.com/gohugoio/hugo/releases/download/v${HUGO_VERSION}/${HUGO_BINARY} /tmp/hugo.deb
 RUN dpkg -i /tmp/hugo.deb \
 	&& rm /tmp/hugo.deb