kubectl apply -f k8s/namespace.yaml && \
kubectl create secret tls adguard-certs -n adguard \
  --cert=certs/fullchain.pem \
  --key=certs/privkey.pem --dry-run=client -o yaml > \
  k8s/secrets.yaml

#  OR WITH NO FILE CREATION:
kubectl create secret tls adguard-certs -n adguard \
  --cert=certs/fullchain.pem --key=certs/privkey.pem \
  --save-config