BugFixes and optimizations

fix shellcheck warnings on download_community
remove gzip
chmod from dockerfile to script itself
better error handling if filename returns empty
apply fix to match download archives for both amd64 and all

core/Dockerfile

@@ -39,11 +39,9 @@ ARG ADDITIONAL_KOPANO_PACKAGES
 COPY download_community.sh /kopano/download_community.sh
 
 RUN \
-    # community download 
+    # community download
     [ ${DOWNLOAD_COMMUNITY_PACKAGES} -eq 1 ] && \
-    chmod a+x /kopano/download_community.sh && \
     /kopano/download_community.sh core && \
-    gzip -f9 Packages; \
     # install
     set -x && \
     echo ${KOPANO_CORE_VERSION} > /kopano/buildversion && \
@@ -61,7 +59,7 @@ RUN \
 
 ENV KOPANO_LOCALE="de_DE.UTF-8"
 ENV KOPANO_USERSCRIPT_LOCALE="de_DE.UTF-8"
-ENV LANG=en_US.UTF-8 
+ENV LANG=en_US.UTF-8
 
 ENV SERVICE_TO_START=server
 
@@ -70,4 +68,4 @@ RUN chmod a+x /kopano/start-service.sh
 
 ENTRYPOINT ["/usr/bin/dumb-init", "--"]
 
-CMD [ "/kopano/start-service.sh" ]
+CMD [ "/kopano/start-service.sh" ]