chore: update docs and branding

Author: antoine-coulon

README.md

@@ -1,13 +1,39 @@
 # NodeSecure CI Action
 
-Please refer to the [@nodesecure/ci](https://github.com/NodeSecure/ci) documentation to see more about available options.
+@nodesecure/ci brings together a set of tools to identify dependencies vulnerabilities 
+and track most common malicious code and patterns.
 
-## Example of options
+Please refer to the [@nodesecure/ci](https://github.com/NodeSecure/ci) documentation to see more about the project.
 
+## Usage
+### Add to an existing Workflow
+
+Simply add this action to your workflow
+
+```yaml
+uses: NodeSecure/[email protected]
+```
+
+### Add a new dedicated Workflow
+
+Here's a sample complete workflow you can add to your repositories:
+
+**`.github/workflows/nodesecure.yml`**
 ```yaml
-with:
-    strategy: npm
-    vulnerabilities: medium
-    warnings: off
-    reporters: console
-```
+name: "NodeSecure Continuous Integration"
+on: [push]
+
+jobs:
+  validation:
+    name: "Validation"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: NodeSecure/[email protected]
+        with:
+            strategy: npm
+            vulnerabilities: medium
+            warnings: off
+            reporters: console
+```
+

action.yml

@@ -1,5 +1,7 @@
-name: 'NodeSecure CI'
+name: 'NodeSecure Continuous Integration'
 description: 'Pipeline of tools that identify dependencies vulnerabilities and track malicious code'
+author: 'NodeSecure'
+
 inputs:
   directory:
     description: 'Root directory from which the analyses will be run'
@@ -20,6 +22,11 @@ inputs:
     description: 'Pipeline reporters'
     required: false
     default: 'console'
+
 runs:
   using: 'node16'
-  main: 'index.js'
+  main: 'index.js'
+
+branding:
+  icon: 'shield'
+  color: purple