deployment/certificate/02-issuer.yaml

apiVersion: cert-manager.io/v1
kind: Issuer
metadata:
  name: letsencrypt
spec:
  acme:
    # The ACME server URL
    server: https://acme-v02.api.letsencrypt.org/directory 
    # https://acme-v02.api.letsencrypt.org/directory ORIGINAL
    # https://acme-staging-v02.api.letsencrypt.org/directory TESTS
    email: jbaquero@vespot.com
    # Name of a secret used to store the ACME account private key
    privateKeySecretRef:
      name: letsencrypt
    solvers:
    - dns01:
        webhook:
          groupName: acme.bwolf.me
          solverName: gandi
          config:
            apiKeySecretRef:
              key: api-token
              name: gandi-credentials1
              namespace: glpi-one