set correct permissions and ownership

Dockerfile

@@ -46,6 +46,12 @@ RUN wget -O $RLFILE http://repository.rainloop.net/v2/webmail/$RLFILE && \
 USER root
 COPY rainloop.conf /etc/nginx/conf.d/rainloop.conf
 COPY nginx.conf /etc/nginx/nginx.conf
+
+# Set correct permissions and ownership
+RUN find $DATA -xdev -type d -exec chmod u=rwx,g=rx,o= '{}' \; && \
+    find $DATA -xdev -type f -exec chmod u=rw,g=r,o= '{}' \; && \
+    chown -Rh $USER:nginx /opt/rainloop
+
 CMD /bin/sh -c "find /var/lib/nginx/tmp > /dev/null; \
                 su -s /bin/sh $USER -c php-fpm && \
                 su -s /bin/sh nginx -c nginx"