Update faq.rst

Added Q/A by @frnknglrt

faq.rst

@@ -66,6 +66,15 @@ Can I embed Kweb within an Android app?
 
 Yes!  Please see `kweb-demos/tree/master/android <https://github.com/kwebio/kweb-demos/tree/master/android>`_ for an example.
 
+I want to deploy a KWeb Application behind a load balancer. What do i need to consider?
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+
+Please make sure to enable session affinity so that repeated requests from the same client end up at the same kweb instance. Kweb does not share it's internal state between multiple instances, so it is important to make sure that each request from a single user ends up at always the same instance. 
+
+If the load balancer uses e.g. round robin strategy for load balancing, repeated requests end up at different backend instances and kweb may not function propery. 
+
+Example how to setup HAProxy can be found [here](https://www.haproxy.com/de/blog/load-balancing-affinity-persistence-sticky-sessions-what-you-need-to-know/).
+
 What about templates?
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