add image_tag variable; improve documentation

readme.md

@@ -23,6 +23,10 @@ jobs:
     container:
       image: ghcr.io/osscontainertools/kaniko:alpine
     steps:
+      # Required
+      - name: Install NodeJS for Action Compatibility
+        run: apk add --no-cache nodejs
+
       - name: Checkout Source Code
         uses: actions/checkout@v4
 
@@ -31,7 +35,8 @@ jobs:
         with:
           registry_user: ${{ secrets.REGISTRY_USER }}
           registry_token: ${{ secrets.REGISTRY_TOKEN }}
-          dockerfile_path: 'test-1/Dockerfile'
-          target_stage: 'development'
-          destination_image: '${{ forgejo.repository }}/foo-image:latest'
+          dockerfile_path: 'sub-directory/Dockerfile'
+          target_stage: 'development' # optional
+          destination_image: '${{ forgejo.repository }}/my-awesome-image'
+          image_tag: 'latest' # optional
 ```