feat: add post api

[yuting1008]

🤔 This is a ...

• feat: add feature
• fix: bug fix
• docs: documentation
• style: formatting, missing semi colons
• refactor: rewrite codes
• test: add tests
• chore: maintain, .gitignore or workflow
• env: environment setup or change
• other: about what?

🔗 Related issue link

#32

💡 Background and solution

1. Failed to connect to database with .env.local, so I connect db via .env instead.
2. Implement POST API of dishes, stores, and users.

☑️ Self-Check before Merge

• yarn lint
• yarn e2e
• yarn test

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
dishcovery	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 7, 2024 11:51am

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