how to define a new value (list format) for substitution in helm template

Question

I need to provide an array to be integrated in helm template like this:

deployment.yaml helm template (truncated):

    containers:
            - ports:
                {{ range $Values.PORTS }} ??
                {{- end }} ??
...
{{- with $Values.livenessProbe}}
          livenessProbe:
            httpGet:
              port: {{ $Values.PORTS[0].containerPort }} ?? --> the first port retrieved in array
{{- end}}

with this as values in file:

  PORTS:
    - containerPort: 1111
      protocol: TCP
      name:  cont1
    - containerPort: 2222
      protocol: TCP
      name:  cont2

the expected result should be (deployment yaml file):

    containers:
      - ports:
          - containerPort: 1111
            protocol: TCP
            name:  cont1
          - containerPort: 2222
            protocol: TCP
            name:  cont2
...
          livenessProbe:
            httpGet:
              port: 1111

Also, I need to check if PORTS key has value defined as array (not string) - condition to add in helm chart

thanks