add buildspec

[listofbanned]

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Checklist before requesting a review

• [ ] I have performed a self-review of my code
• [ ] I am not adding any irrelevant code or assets
• [ ] I am only including the changes needed to implement the change
• [ ] I have playtested and intentionally tried to find error cases but couldn't

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Name	Status	Preview	Updated
webaverse	✅ Ready (Inspect)	Visit Preview	Feb 8, 2023 at 1:35PM (UTC)