patch: added new pacmage support and changes to workflow

.github/workflows/docker-build.yml

@@ -2,6 +2,7 @@ name: Build and Push Multi-Arch Docker Image
 
 on:
   workflow_dispatch:
+  pull_request:
   push:
     branches:
       - main
@@ -48,3 +49,14 @@ jobs:
           tags: |
             ${{ secrets.DOCKER_USERNAME }}/net-utils:latest
             ghcr.io/${{ github.repository_owner }}/net-utils:latest
+
+      - name: Delete untagged images from GHCR
+        if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+        uses: actions/delete-package-versions@v4
+        with:
+          package-name: 'net-utils'
+          package-type: 'container'
+          min-versions-to-keep: 5
+          delete-only-untagged-versions: 'true'
+        env:
+          TOKEN: ${{ secrets.GH_PAT }}

Dockerfile

@@ -7,6 +7,7 @@ RUN apk update && apk add --no-cache \
     netcat-openbsd \
     bind-tools \
     openssl \
+    nmap \
     bash
 
 CMD ["/bin/bash"]

Readme.md

@@ -11,8 +11,25 @@ The image includes the following tools:
 - `openssl` – Toolkit for SSL/TLS and general cryptography
 - `dig` – DNS lookup utility
 - `nslookup` – DNS query tool
+- `nmap` – Network mapping and port scanning utility
 
-## Usage in Kubernetes
+## Usage
+
+### Running as a Docker Container
+
+You can run this image directly using Docker:
+
+```sh
+docker run -it rdev2021/net-utils:latest
+```
+
+Or with a specific command:
+
+```sh
+docker run -it rdev2021/net-utils:latest curl https://example.com
+```
+
+### Usage in Kubernetes
 
 You can use this image as a temporary debug pod in a Kubernetes cluster.