Misc changes (#268)

* fixes for setup-tools.sh

fixes https://github.com/zokradonh/kopano-docker/issues/266

* add startup tests for meet demo
* add architecture to contributing file
* define ical_listen for kopano-ical
* precreate database if it does not yet exist
* fix spelling

examples/meet/tests/startup-test/Dockerfile

@@ -0,0 +1,6 @@
+ARG docker_repo=zokradonh
+FROM ${docker_repo}/kopano_scheduler
+
+COPY test.sh /start.sh
+
+CMD ["/start.sh"]