helm config map from external yaml file

Question

I want to update my helm dependencies with configurations , declared in central folder ,among microservices . having the following tree of folders

- config-repo
  - application.yml
  - specific.yml
- kubernetes
  - helm
  - common
  - components
    - microservice#1 (templates relating to )
      - config-repo
        - application.yml
        - specefic.yml
      - templates
        - configmap_from_file.yaml
      - values.yaml
      - Chart.yaml
    - microservice#2
    - ...

here is the template of microservice#1 configmap_from_file.yaml file

apiVersion: v1
kind: ConfigMap
metadata:
  name: {{ include "common.fullname" . }}
  labels:
    app.kubernetes.io/name: {{ include "common.name" . }}
    helm.sh/chart: {{ include "common.chart" . }}
    app.kubernetes.io/managed-by: {{ .Release.Service }}
data:
{{ (.Files.Glob "config-repo/*").AsConfig | indent 2 }}
{{- end -}}

and inside of microservice#1's config-repo files are

specific.yml

../../../../../config-repo/specific.yml

application.yml

../../../../../config-repo/application.yml

they both are just reference to other files

when I command helm dep update . and then helm template . -s templates/configmap_from_file.yaml

I expect the following output

apiVersion: v1
kind: ConfigMap
metadata:
  name: review
  labels:
    app.kubernetes.io/name: review
    helm.sh/chart: review-1.0.0
    app.kubernetes.io/managed-by: Helm
data:
  application.yml: CONTENTS OF THE FILE IN ADDRESS
  specific.yml: CONTENTS OF THE FILE IN ADDRESS

but the following is appeared

apiVersion: v1
kind: ConfigMap
metadata:
  name: review
  labels:
    app.kubernetes.io/name: review
    helm.sh/chart: review-1.0.0
    app.kubernetes.io/managed-by: Helm
data:
  application.yml: ../../../../../config-repo/application.yml
  specific.yml: ../../../../../config-repo/specific.yml

why just address is injected and not the content are appeared