added godoc badge

Author: dmarkhas

README.md

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 # HTTP Client Side Load Balancer
 [![Actions Status](https://github.com/AppsFlyer/go-consul-resolver/workflows/go-consul-resolver/badge.svg?branch=main)](https://github.com/AppsFlyer/go-consul-resolver/actions)
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 A library of composable layers that is designed to provide client-side load balancing for (but not limited to) HTTP client-server communication, using Consul as the service discovery layer