feat: checkout repo in action

Author: owojcikiewicz

action.yml

@@ -41,5 +41,15 @@ inputs:
     default: true
 
 runs:
-  using: node20
-  main: dist/index.js
+  using: 'composite'
+  steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+
+    - name: Setup Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version: 20
+
+    - name: Run Action
+      run: node dist/index.js