Make it command-line tool

[rikuson]

It is hosted on Heroku.
But it will be charged since they will update the plan.
So I want to make this command-line tool.

Enable to add third-party repository like helm.

eolbar repo add endoflife https://endoflife.date/api/all.json
eolbar repo add myproduct https://rikuson.github.io/eol # look for index.yml or index.json