Contributor experience improvement

[hzxuzhonghu]

In order to improve the contributor experience, we need many more docs:

• contributor guide: about how to contribute to valocano

• development guide: how to setup a development environment

• Testing: How to run kinds of tests, include ut, e2e.

• Code Conventions: coding style advice

[TommyLike]

@hzxuzhonghu
ADD MORE

1. volcano usecase document (Maybe add document for our sample document?)
2. volcano install improvement

[TommyLike]

2. volcano install improvement

/assign myself

[volcano-sh-bot]

@TommyLike: GitHub didn't allow me to assign the following users: myself.

Note that only volcano-sh members and repo collaborators can be assigned and that issues/PRs can only have 10 assignees at the same time.
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In response to this:

2. volcano install improvement

/assign myself

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[k82cn]

volcano usecase document (Maybe add document for our sample document?)

Two improvements are necessary: contributor experience and user experience; that's more about user experiences. Both of them are important, but let's open another issue for user experiences.

[TommyLike]

volcano usecase document (Maybe add document for our sample document?)

Two improvements are necessary: contributor experience and user experience; that's more about user experiences. Both of them are important, but let's open another issue for user experiences.

here #335