update to libreoffice24

Dockerfile

@@ -29,12 +29,15 @@ ENV NONPRIVGROUP=jodconverter
 
 COPY --from=jresource /jre $JAVA_HOME
 
-RUN apt-get update && apt-get -y install \
+# using backports for libreoffice 24.x (bookworm has 7.x)
+RUN echo 'deb http://deb.debian.org/debian bookworm-backports main' > /etc/apt/sources.list.d/backports.list \
+  apt-get update && apt-get -y install \
   apt-transport-https locales-all libpng16-16 libxinerama1 libgl1-mesa-glx libfontconfig1 libfreetype6 libxrender1 \
   libxcb-shm0 libxcb-render0 adduser cpio findutils gosu \
   # procps needed for us finding the libreoffice process, see https://github.com/sbraconnier/jodconverter/issues/127#issuecomment-463668183
   procps \
-  && apt-get -y install libreoffice libreoffice-java-common --no-install-recommends \
+  # using backports for libreoffice 24.x (bookworm has 7.x)
+  && apt-get -y install -t bookworm-backports libreoffice libreoffice-base libreoffice-common libreoffice-base-core \
   && groupadd $NONPRIVGROUP \
   && useradd -m $NONPRIVUSER -g $NONPRIVGROUP \
   && rm -rf /var/lib/apt/lists/*