Merge pull request #82 from Flagsmith/docs/update-readme

docs: update readme

README.md

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+[![Feature Flag, Remote Config and A/B Testing platform, Flagsmith](https://raw.githubusercontent.com/Flagsmith/flagsmith/main/static-files/hero.png)](https://www.flagsmith.com/)
+
+[![Join the Discord chat](https://img.shields.io/discord/517647859495993347)](https://discord.gg/hFhxNtXzgm)
+
+[Flagsmith](https://flagsmith.com/) is an open source, fully featured, Feature Flag and Remote Config service. Use our
+hosted API, deploy to your own private cloud, or run on-premise.
+
+# Edge Proxy
+
+The Flagsmith Edge Proxy allows you to run an instance of the Flagsmith Engine close to your servers. If you are running
+Flagsmith within a server-side environment and you want to have very low latency flags, you have two options:
+
+1. Run the Edge Proxy and connect to it from your server-side SDKs
+2. Run your server-side SDKs in [Local Evaluation Mode](https://docs.flagsmith.com/clients/overview#2---local-evaluation).
+
+The main benefit to running the Edge Proxy is that you reduce your polling requests against the Flagsmith API itself.
+
+The main benefit to running server side SDKs in [Local Evaluation Mode](https://docs.flagsmith.com/clients/overview#2---local-evaluation) is that you get the lowest possible latency.
+
+## Useful Links
+
+[Documentation](https://docs.flagsmith.com/advanced-use/edge-proxy)