feat: allow default values for anything in the config file

[pruje]

Is your feature request related to a problem? Please describe.
I'm using argus for requesting a large amount of services, and for all of them I'm using HTTP headers to request deployed services.
My config.yml file is growing and becoming a mess to edit, and there is a problem of data duplication.

Describe the solution you'd like
It would be great if we could define defaults values for any fields. Like we could have this:

defaults:
  service:
    latest_version:
      type: url
      url_commands:
        - type: regex
          regex: ([0-9.]+)
    deployed_version:
      type: url
      method: GET
      headers:
        - key: Authorization
          value: Bearer <Personal-Access-Token>
service:
  app1:
    latest_version:
      url: https://...
    deployed_version:
      url: https://...
  app2:
    latest_version:
      url: https://...
    deployed_version:
      url: https://...

instead of this:

service:
  app1:
    latest_version:
      type: url
      url: https://...
      url_commands:
        - type: regex
          regex: ([0-9.]+)
    deployed_version:
      type: url
      method: GET
      url: https://...
      headers:
        - key: Authorization
          value: Bearer <Personal-Access-Token>

  app2:
    latest_version:
      type: url
      url: https://...
      url_commands:
        - type: regex
          regex: ([0-9.]+)
    deployed_version:
      type: url
      method: GET
      url: https://...
      headers:
        - key: Authorization
          value: Bearer <Personal-Access-Token>

Describe alternatives you've considered

• Copy/paste everywhere
• Use environment variables
• Write a custom python script to manipulate data

Thanks!

[JosephKav]

That would be nice. Can look into adding this :)