beautify README

README.md

@@ -1,7 +1,28 @@
-This is a image for generating ignition manifests & kubeconfig
+### This is a image for generating ignition manifests & kubeconfig
 
 after updating the installer-config.yaml file template run this image with the directory containing the installer-config.yaml file mounted
 for example:
 
+```
 docker run -v $(pwd)/installer_dir:/installer_dir -it quay.io/oscohen/ignition-manifests-and-kubeconfig-generate:latest
+```
 in the mounted dir the ignition files and the kubeconfig will be generated.
+
+Usage: 
+```
+usage: process-ignition-manifests-and-kubeconfig.py [-h]
+                                                       [--file_name FILE_NAME]
+                                                       [--s3_endpoint_url S3_ENDPOINT_URL]
+                                                       [--s3_bucket S3_BUCKET]
+   
+   Generate ignition manifest & kubeconfig
+   
+   optional arguments:
+     -h, --help            show this help message and exit
+     --file_name FILE_NAME
+                           output directory name
+     --s3_endpoint_url S3_ENDPOINT_URL
+                           s3 endpoint url
+     --s3_bucket S3_BUCKET
+                           s3 bucket
+```