Adding clair plugin

stable/clair/README.md

@@ -0,0 +1,27 @@
+# Codefresh Clair Plugin
+
+Use Codefresh [Clair](https://github.com/coreos/clair) plugin to scan your docker image and find security vulnerabilities.
+
+## Usage
+
+Set required and optional environment variable and add the following step to your Codefresh pipeline:
+
+```yaml
+---
+version: '1.0'
+
+steps:
+
+  ...
+
+  release_to_env:
+    image: codefresh/plugin-clair:1.0.0
+
+  ...
+
+```
+
+## Environment Variables
+
+- **required** `CHART_NAME` - Helm chart name
+- `TIMEOUT` - wait timeout (5min by default)