use newer ubuntu and newer libreoffice

.drone.yml

@@ -10,9 +10,9 @@
     repo: xcgd/libreoffice
     tags:
       - latest
-      - 5.1.6
-      - 5.1
-      - 5
+      - 6.0.7
+      - 6.0
+      - 6
     build-args:
       - REVISION=${DRONE_COMMIT}
       - CREATED=${DRONE_BUILD_STARTED}

Dockerfile

-FROM ubuntu:xenial
-MAINTAINER florent.aide@gmail.com
+FROM ubuntu:18.04
+LABEL maintainer="release@xcg-consulting.fr"
+ARG REVISION=""
+ARG CREATED=""
+LABEL org.opencontainers.image.revision=$REVISION
+LABEL org.opencontainers.image.vendor="XCG"
+LABEL org.opencontainers.image.version="6.0.7"
+LABEL org.opencontainers.image.authors="XCG"
+LABEL org.opencontainers.image.created=$CREATED
+LABEL org.opencontainers.image.title="Libreoffice"
+LABEL org.opencontainers.image.description="A headless libreoffice server"
 
 ENV DEBIAN_FRONTEND noninteractive
@@ -3,4 +12,3 @@
 
 ENV DEBIAN_FRONTEND noninteractive
-# version 1:4.2.8-0ubuntu2
 
@@ -6,5 +14,8 @@
 
-RUN apt-get update && apt-get -y -q install libreoffice libreoffice-writer ure libreoffice-java-common libreoffice-core libreoffice-common openjdk-8-jre fonts-opensymbol hyphen-fr hyphen-de hyphen-en-us hyphen-it hyphen-ru fonts-dejavu fonts-dejavu-core fonts-dejavu-extra fonts-noto fonts-dustin fonts-f500 fonts-fanwood fonts-freefont-ttf fonts-liberation fonts-lmodern fonts-lyx fonts-sil-gentium fonts-texgyre fonts-tlwg-purisa && apt-get -q -y remove libreoffice-gnome
+RUN set -x ; \
+	apt-get update \
+	&& apt-get -y -q install libreoffice libreoffice-writer ure libreoffice-java-common libreoffice-core libreoffice-common openjdk-8-jre fonts-opensymbol hyphen-fr hyphen-de hyphen-en-us hyphen-it hyphen-ru fonts-dejavu fonts-dejavu-core fonts-dejavu-extra fonts-noto fonts-dustin fonts-f500 fonts-fanwood fonts-freefont-ttf fonts-liberation fonts-lmodern fonts-lyx fonts-sil-gentium fonts-texgyre fonts-tlwg-purisa \
+	&& apt-get -q -y remove libreoffice-gnome libreoffice-gtk3
 EXPOSE 8997
 
 RUN adduser --system --disabled-password --gecos "" --shell=/bin/bash libreoffice