updated readme to reflect conversion of project into a terraform module

Author: andreygubarev

README.md

@@ -1,25 +1,43 @@
-# Self-extractable archive
+# Terraform Module for Self-Extractable Archive
 
-## Prerequisite
+This module creates a self-extractable archive from a directory using [makeself](https://makeself.io/). The archive can be used to bootstrap a new instance using cloud-init.
 
-For MacOS:
-```bash
-brew install gnu-tar
-export PATH="/opt/homebrew/opt/gnu-tar/libexec/gnubin:$PATH"
+## Usage
+
+Quick start:
+
+```terraform
+module "bootstrap" {
+  source      = "andreygubarev/self-extractable-archive/external"
+  version     = "1.1.0"
+  archive_dir = "${path.module}/bootstrap"
+}
 ```
 
-## Usage Example
+Advanced usage:
+
 ```terraform
 module "bootstrap" {
-  ...
+  source  = "andreygubarev/self-extractable-archive/external"
+  version = "1.1.0"
 
   archive_dir    = "${path.module}/bootstrap"
   file_name      = "bootstrap.run"
   startup_script = "./entrypoint.sh"
 }
 ```
 
+## Prerequisite
+
+For MacOS:
+```bash
+brew install gnu-tar
+export PATH="/opt/homebrew/opt/gnu-tar/libexec/gnubin:$PATH"
+```
+
+
+
 # Reference
 
-https://makeself.io/
-https://registry.terraform.io/providers/hashicorp/external/latest
+- https://makeself.io/
+- https://registry.terraform.io/providers/hashicorp/external/latest