doc: update helm install instruction

.github/workflows/publish.yaml

@@ -102,6 +102,7 @@ jobs:
             -e 's|tag:.*|tag: latest|g' \
             -e 's|providerRegex:.*|providerRegex: ^.+$|g' \
             -e 's|maxExpirationSeconds:.*|maxExpirationSeconds: "86400"|g' \
+            -e 's|bypassDnsResolution:.*|bypassDnsResolution: true|g' \
             charts/kubelet-csr-approver/values.yaml
           cat charts/kubelet-csr-approver/values.yaml
       - name: Run chart-testing (install)
@@ -136,7 +137,7 @@ jobs:
         run: |
           export REF=${{ github.ref}}
           export COMMIT=${{ github.sha}}
-          export TAG=$(echo ${{ github.ref }} | cut -d "/" -f 3 - ) 
+          export TAG=$(echo ${{ github.ref }} | cut -d "/" -f 3 - )
           ko publish ./cmd/kubelet-csr-approver/ --base-import-paths --platform=linux/amd64,linux/arm64,linux/arm --tags $TAG
 
   publish-helm-charts:
@@ -160,7 +161,7 @@ jobs:
         run: |
           git config user.name "$GITHUB_ACTOR"
           git config user.email "[email protected]"
-          
+
       - name: Install Helm
         uses: azure/setup-helm@v1
         with:
@@ -187,7 +188,7 @@ jobs:
         with:
           go-version: 1.17
           stable: true
-            
+
       - name: Login to DockerHub
         uses: docker/login-action@v1
         with:

README.md

@@ -60,6 +60,7 @@ helm repo add kubelet-csr-approver https://postfinance.github.io/kubelet-csr-app
 helm install kubelet-csr-approver kubelet-csr-approver/kubelet-csr-approver -n kube-system \
   --set providerRegex='^node-\w*\.int\.company\.ch$' \
   --set maxExpirationSeconds='86400'
+  --set bypassDnsResolution='false'
 ```
 
 ## Attacker model -- what could go wrong ?