Update dependabot

[JunHyungJang]

This is my first attempt to contribute open sources.

I add the dependabot.yml file following this repo https://github.com/argoproj/argo-cd/blob/master/.github/dependabot.yml

Is there anything else I should add?

• close Enable dependabot #762

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.98%. Comparing base (24f6815) to head (845a5ca).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #775   +/-   ##
=======================================
  Coverage   67.98%   67.98%           
=======================================
  Files          31       31           
  Lines        3124     3124           
=======================================
  Hits         2124     2124           
  Misses        856      856           
  Partials      144      144           

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[chengfang]

@JunHyungJang since the reference dependabot config is from a different project (argo-cd), we'll need to adjust it for this project, e.g., in subdirectories and their package-ecosystem. As mentioned in the related issue, I think we can go with longer update interval to avoid too frequent updates: weekly or even monthly should be fine.

[JunHyungJang]

@chengfang I recognize what you said. Received feedbacks, I changed the interval. I also track the dockerfile and add the package-ecosystem to the right directories.

[chengfang]

@JunHyungJang thanks!

[injae-kim]

Nice work @JunHyungJang !