diff --git a/readme.txt b/readme.txt
index b8003ea..4de1bac 100644
--- a/readme.txt
+++ b/readme.txt
@@ -2,4 +2,6 @@
 go mod init go-s3-upload
 go get github.com/aws/aws-sdk-go/service/s3
 
+docker run --rm -v "$PWD":/usr/src/myapp -w /usr/src/myapp golang:1.21 go build -v
+
 go run main.go <aws-region> <aws-access-key-id> <aws-secret-access-key> <bucket-name> </folder/file_name.ext OnS3> <file-path>