renew apiserver and etcd certs on konk pod startup #302
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The etcd and apiserver certs generated by kubeadm are only valid for one year. Every time kubeadm runs, it will renew the certs, but before this change konk would never overwrite the existing certs with the new ones. This PR patches the existing certs with the freshly generated ones when the pod starts and every 90 days.
An alternative approach would be to redesign this process to use cert-manager (#303).