Prepare update of kopano-meet for Univention (#466)

* add kapps repo to base image to prevent from potentially updated components (for example kweb)
* kapps needs to be added to php image, not webapp image
* ignore unknown syntax for build time secrets
* update Konnect

base/Dockerfile

@@ -83,6 +83,7 @@ ONBUILD RUN \
     . /kopano/helper/create-kopano-repo.sh && \
     if [ ${DOWNLOAD_COMMUNITY_PACKAGES} -eq 1 ]; then \
         dl_and_package_community "core" "$DOWNLOAD_DISTRIBUTION" "$DOWNLOAD_CHANNEL" "$DOWNLOAD_BRANCH"; \
+        dl_and_package_community "kapps" "$DOWNLOAD_DISTRIBUTION" "$DOWNLOAD_CHANNEL" "$DOWNLOAD_BRANCH"; \
     fi
 
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