Add README.md

README.md

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 # nettools
-Nettools to debugs
+Nettools to debugs. Container image with network tools for troubleshooting Kubernetes clusters
+
+- To check some networking issues in a cluster:
+
+```sh
+kubectl run -it --image=ghcr.io/duyhenryer/nettools:1.0.0 nettools --restart=Never -n default
+```
+
+- Pod template example:
+````yaml
+apiVersion: v1
+kind: Pod
+metadata:
+  name: nettools
+  namespace: default
+spec:
+  containers:
+  - name: nettools
+    image: ghcr.io/duyhenryer/nettools:1.0.0
+    command: ["/bin/sleep", "infinity"]
+    imagePullPolicy: IfNotPresent
+  restartPolicy: Never
+````
+- Deplyment template example:
+```yaml
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nettools
+  namespace: default
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: nettools
+  template:
+    metadata:
+      labels:
+        app: nettools
+    spec:
+      containers:
+      - name: nettools
+        image: ghcr.io/duyhenryer/nettools:1.0.0
+        command: ["/bin/sleep", "infinity"]
+        imagePullPolicy: IfNotPresent
+```
+
+You can keep the following yaml file handy and run it in a pod
+
+```sh 
+kubectl apply -f nettools.yaml
+```
+and login to the container
+```sh 
+kubectl exec -it nettools -n default bash
+```
+- If you just want to use the network tools on a docker host:
+
+```sh
+docker run -it ghcr.io/duyhenryer/nettools:1.0.0
+```