Update node version, kubectl installation method, build instructions

Author: sedders123

Dockerfile

@@ -1,9 +1,9 @@
-FROM node:10
+FROM node:20
 
 RUN npm install -g cloudflare-cli
 RUN apt-get update
 RUN apt-get install -y jq
-RUN curl -LO https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/$(dpkg --print-architecture)/kubectl
+RUN curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/$(dpkg --print-architecture)/kubectl"
 RUN chmod +x ./kubectl
 RUN mv ./kubectl /usr/local/bin/kubectl
 RUN kubectl version --client

k8s-tools.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-echo cloudflare-cli: k8s-tools v0.0.16
+echo cloudflare-cli: k8s-tools v0.0.17
 
 bad=0
 if [ -z "$action" ]; then echo "variable 'action' is not set"; bad=1; fi

readme.md

@@ -1,3 +1,17 @@
-## Build with docker buildx:
+# cloudflare-cli
 
-docker buildx build --platform linux/amd64,linux/arm64 . -f ./Dockerfile --tag docker.io/redriversoftware/cloudflare-cli:VERSION --push
+This tool is used as aprt of our [helm charts](https://github.com/RedRiverSoftware/k8s/tree/master/helm3-charts) to manage Cloudflare DNS records automatically post deployment.
+
+## Update the Docker image
+
+Authenticate to the Azure Container Registry:
+
+```bash
+az acr login -n RedRiver
+```
+
+Build and push the image to the Azure Container Registry:
+
+```bash
+docker build . --tag redriver.azurecr.io/cloudflare-cli:VERSION --push
+```