feat(tutorials): add Next.js x Serverless SQL DB tutorial

[SamyOubouaziz]

Summary

Checklist

• I have reviewed this myself.
• I have attached a README to my example. You can use this template as reference.
• I have updated the project README to link my example.

Details

• Tutorial written by @fpagny and reviewed by doc team, readme needs to be updated with Github MD syntax and correct links before merging.

• Added license file

• Rewrote readme to point to docs

[thomas-tacquet]

Update the main README.md 🙏

[Shillaker]

It seems like there are two copies of the public directory, so all the images are included twice.

Is this necessary?

[SamyOubouaziz]

It seems like there are two copies of the public directory, so all the images are included twice.

Is this necessary?

@Shillaker Yes, it comes from the official Next.js repo