chore(doc): Update Readme (#5)

README.md

@@ -1 +1,44 @@
 # Headscale Client Go
+
+[![Go Reference](https://pkg.go.dev/badge/github.com/tailscale/tailscale-client-go/v2.svg)](https://pkg.go.dev/github.com/hibare/headscale-client-go)
+[![Go Report Card](https://goreportcard.com/badge/github.com/hibare/headscale-client-go)](https://goreportcard.com/report/github.com/hibare/headscale-client-go)
+
+A client implementation for the [Headscale](https://headscale.net) HTTP API.
+
+## Example (Using API Key)
+
+```go
+package main
+
+import (
+	"context"
+	"fmt"
+	"log/slog"
+	"os"
+
+	hsClient "github.com/hibare/headscale-client-go"
+)
+
+func main() {
+	slog.SetLogLoggerLevel(slog.LevelDebug) // Optional
+
+	serverUrl := os.Getenv("HS_SERVER_URL")
+	apiToken := os.Getenv("HS_API_TOKEN")
+
+	client, err := hsClient.NewClient(serverUrl, apiToken, hsClient.HeadscaleClientOptions{})
+	if err != nil {
+		panic(err)
+	}
+
+	nodes, err := client.Nodes().List(context.Background())
+	if err != nil {
+		panic(err)
+	}
+
+	for _, node := range nodes.Nodes {
+		fmt.Printf("Node: %s\n", node.Name)
+	}
+
+}
+
+```