improved docs after feedback

Author: raymcdermott

README.md

@@ -1,17 +1,22 @@
 # linuxkit-build
-A Github action to enable LinuxKit OS image builds
+A Github action to enable [LinuxKit](https://github.com/linuxkit/linuxkit) OS image builds
+
+LinuxKit describes itself as:
+> A toolkit for building secure, portable and lean operating systems for containers
+
+This action relies on a [Docker image of LinuxKit](https://hub.docker.com/repository/docker/vouchio/linuxkit-docker)
 
 ## Inputs
 
 ### `config`
 
-**Required** LinuxKit YAML configuration to build (eg lxk-build.yml). There is no default.
+**Required** LinuxKit YAML file(s) to build (eg `lxk.yml`). There is no default.
 
 ### `format`
 
-**Optional** The format for the output (eg `aws`, `gcp`, `iso-efi`, etc...). 
+**Optional** The format(s) for the output (eg `aws`, `gcp`, `iso-efi`, etc...). 
 
-**Default** `kernel+initrd`
+**Default:** `kernel+initrd`
 
 ## Outputs
 
@@ -22,15 +27,17 @@ The files that were built
 ## Example usage - default
 
 ```yaml 
-uses: actions/linuxkit-docker-action@v1
+# Check the action marketplace for the latest version tag
+uses: actions/[email protected]
 with:
   config: lxk-build.yml
 ```
 
 ## Example usage - AWS
 
 ```yaml 
-uses: actions/linuxkit-docker-action@v1
+# Check the action marketplace for the latest version tag
+uses: actions/[email protected]
 with:
   config: lxk-build.yml
   format: aws

action.yml

@@ -6,7 +6,7 @@ branding:
   color: purple
 inputs:
   config:
-    description: 'LinuxKit YAML configuration to build (eg lxk-build.yml)'
+    description: 'LinuxKit YAML configuration file(s) (eg lxk-build.yml)'
     required: true
   format:
     description: 'The output format (eg aws, gcp, iso-efi, etc...)'