feat(monitoring): general fixup

- added healthcheck for every service
- added nginx second "server" block for monitoring
    all monitoring services are now behind this nginx reverse proxy
- fixed logging driver not present for chat service

nginx/conf/locations/monitoring.conf

@@ -1,4 +0,0 @@
-location /monitoring/ok {
-    add_header Content-Type text/plain;
-    return 200 'healthy';
-}