Create hello.md

[zyxbest]

What problem does this PR solve?

What is changed and how it works?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Code changes

• Has exported function/method change
• Has exported variable/fields change
• Has interface methods change
• Has persistent data change

Side effects

• Possible performance regression
• Increased code complexity
• Breaking backward compatibility

Related changes

• Need to cherry-pick to the release branch
• Need to update the documentation
• Need to update the tidb-ansible repository

Release note

• Write release note for bug-fix or new feature.

[zyxbest]

/meow caturday

[sre-bot]

@qrr1995:

In response to this:

/meow caturday

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[sre-bot]

/test all

[sre-bot]

/help

[sre-bot]

/meow caturday

[sre-bot]

@sre-bot:

In response to this:

/meow caturday

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[sre-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: qrr1995
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