update README

README.md

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-# uncloud
-Self-hosted alternative to fly.io
+# Uncloud
+
+Uncloud is a lightweight tool for deploying and managing containerised applications across a network of Docker hosts. It
+bridges the gap between simple Docker deployments and complex cloud platforms and container orchestrators like
+Kubernetes.
+
+Our goal is to become the go-to self-hosted alternative to platforms like [Fly.io](https://fly.io) and
+[Render](https://render.com/). Whether you're using bare metal servers, Raspberry Pis, or cloud VMs, Uncloud transforms
+your hardware into a personal cloud platform.