add README

README.rst

@@ -0,0 +1,16 @@
+Terraform module to post install a alpine VM 
+
+Usage
+-----
+
+In the root terraform add::
+
+   module "postinstall" {
+      source                 = "../alpine_postinstall"
+      connection_ip          = var.eth0_ip
+      connection_private_key = file(var.pm_private_key)
+    }
+
+
+.. vim: spelllang=fr:
+