patch original run-eressea.cron instead of duplicating script

Dockerfile

@@ -36,6 +36,7 @@ RUN mkdir -p /eressea/server && \
 FROM eressea-base as eressea
 ARG eressea_branch
 COPY docker-assets/backup-eressea.patch /eressea/
+COPY docker-assets/run-eressea.cron.patch /eressea/
 RUN DEBIAN_FRONTEND="noninteractive" apt-get install -y \
     cmake luarocks libxml2-dev liblua5.2-dev libtolua-dev libncurses5-dev libsqlite3-dev \
     libexpat1-dev && \
@@ -44,6 +45,7 @@ RUN DEBIAN_FRONTEND="noninteractive" apt-get install -y \
     cd git.eressea && \
     git submodule update --init && \
     patch process/backup-eressea < /eressea/backup-eressea.patch && \
+    patch process/cron/run-eressea.cron < /eressea/run-eressea.cron.patch && \
     s/cmake-init && \
     s/build && \
     ln -sf conf/eressea.ini && \
@@ -76,13 +78,13 @@ RUN apt-get update && \
 
 COPY docker-assets/template-config/ /eressea/template-config/
 COPY docker-assets/lua-scripts/ /eressea/lua-scripts/
-COPY docker-assets/run-eressea.sh /eressea/run-eressea.sh
 COPY docker-assets/start.sh /eressea/start.sh
 COPY --from=eressea /eressea/server/ /eressea/server/
 COPY --from=eressea /eressea/server/etc/report-mail.de.txt /eressea/template-mail/report-mail.de.txt
 COPY --from=eressea /eressea/server/etc/report-mail.en.txt /eressea/template-mail/report-mail.en.txt
 COPY --from=eressea /eressea/git.eressea/scripts/tools /eressea/server/scripts/tools
 COPY --from=eressea /eressea/git.eressea/s/preview /eressea/server/bin/
+COPY --from=eressea /eressea/git.eressea/process/cron/run-eressea.cron /eressea/run-eressea.sh
 COPY --from=eressea /usr/games/echeck /usr/games/echeck
 COPY --from=eressea /usr/share/locale/de/LC_MESSAGES/ /usr/share/locale/de/LC_MESSAGES/
 COPY --from=eressea /usr/share/games/echeck/ /usr/share/games/echeck/