[helm] feat: add helm hellok8s:v6 code.

Author: guangzhengli

hello-helm/main.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+)
+
+func hello(w http.ResponseWriter, r *http.Request) {
+	host, _ := os.Hostname()
+	message := os.Getenv("MESSAGE")
+	namespace := os.Getenv("NAMESPACE")
+	dbURL := os.Getenv("DB_URL")
+	dbPassword := os.Getenv("DB_PASSWORD")
+
+	io.WriteString(w, fmt.Sprintf("[v6] Hello, Helm! Message from helm values: %s, From namespace: %s, From host: %s, Get Database Connect URL: %s, Database Connect Password: %s", message, namespace, host, dbURL, dbPassword))
+}
+
+func main() {
+	http.HandleFunc("/", hello)
+	http.ListenAndServe(":3000", nil)
+}