Insert cert-manager

Fixes #31

kubernetes/certmanager/README.md

@@ -0,0 +1,19 @@
+
+
+helm repo add jetstack https://charts.jetstack.io
+
+
+Install CRDs
+(option 1) manually:
+kubectl apply -f https://github.com/jetstack/cert-manager/releases/download/v1.7.0/cert-manager.crds.yaml
+
+Or
+install with helm
+--set installCRDs=true
+
+$ helm install \
+  cert-manager jetstack/cert-manager \
+  --namespace cert-manager \
+  --create-namespace \
+  --version v1.7.0 \
+  # --set installCRDs=true