Run all containers read-only (#314)

* switch containers in compose file to read-only
related to https://github.com/zokradonh/kopano-docker/issues/310
* make scheduler container read-only
* make meet container read-only
* fix konnect for read-only
* make core mostly read-only
* add custom location for ldap.cfg to default config
* sort config option for readability
* update makefile pull workaround
* make kdav read-only
* remove locale generation code from core startup
* fix commander tests
* fix store language tests
* add test for a dutch mailbox
* make it possible to run webapp read-only
* add locale hint to the compose file
* finish read-only mode for z-push

meet/Dockerfile

@@ -49,8 +49,10 @@ RUN \
         kopano-meet kopano-meet-webapp \
         ${ADDITIONAL_KOPANO_PACKAGES} \
         && \
-    cp /usr/share/doc/kopano-meet-webapp/config.json.in /usr/share/kopano-kweb/www/config/kopano/meet.json && \
-    rm -rf /var/cache/apt /var/lib/apt/lists
+    rm -rf /var/cache/apt /var/lib/apt/lists && \
+    # make configuration a symlink to prevent overwriting it
+    # TODO better would be to override its configuration in kweb.cfg
+    ln -s /tmp/meet.json /usr/share/kopano-kweb/www/config/kopano/meet.json
 
 COPY defaultconfigs/ start-service.sh /kopano/
 COPY goss.yaml /goss/