refactor download file to utils

aws-experiment-launch/experiment/utils/utils.go

@@ -0,0 +1,29 @@
+package utils
+
+import (
+	"io"
+	"net/http"
+	"os"
+)
+
+func DownloadFile(filepath string, url string) {
+	// Create the file
+	out, err := os.Create(filepath)
+	if err != nil {
+		panic(err)
+	}
+	defer out.Close()
+
+	// Get the data
+	resp, err := http.Get(url)
+	if err != nil {
+		panic(err)
+	}
+	defer resp.Body.Close()
+
+	// Write the body to file
+	_, err = io.Copy(out, resp.Body)
+	if err != nil {
+		panic(err)
+	}
+}