Add documentation for channel input (#16)

* Fix action.yml

* Fix readme with channel info

* Minor documentation fixes

Author: jswny

README.md

@@ -26,14 +26,14 @@ A [GitHub Action](https://github.com/features/actions) to deploy apps to any ser
 
 ## Inputs
 ### `deploy_server`
-| Required | Description |
-| --- | --- |
-| **Yes** | The IP address of the SSH-enabled server to deploy to. |
+| Required | Default | Description |
+| --- | --- | --- |
+| **Yes** | N/A | The IP address of the SSH-enabled server to deploy to. |
 
 ### `deploy_username`
-| Required | Description |
-| --- | --- |
-| **Yes** | The username of the account associated with the provided SSH key to access on the deploy server. |
+| Required | Default | Description |
+| --- | --- | --- |
+| **Yes** | N/A | The username of the account associated with the provided SSH key to access on the deploy server. |
 
 ### `deploy_root_dir`
 | Required | Default | Description |
@@ -45,6 +45,11 @@ A [GitHub Action](https://github.com/features/actions) to deploy apps to any ser
 | --- | --- | --- |
 | **Yes** | N/A | The SSH key to be used to access the deploy server. |
 
+### `channel`
+| Required | Default | Description |
+| --- | --- | --- |
+| No | `stable` | The IP address of the SSH-enabled server to deploy to. |
+
 ### `path`
 | Required | Default | Description |
 | --- | --- | --- |

action.yml

@@ -1,6 +1,10 @@
 name: 'Deploy'
 description: 'Deploy Docker Compose app via SSH'
 inputs:
+  channel:
+    description: 'The deployment channel'
+    required: false
+    default: 'stable'
   deploy_server:
     description: 'The SSH-enabled server to deploy to'
     required: true