feat: add layer0 preset

[pi0]

🔗 Linked issue

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

Extracterd from @layer0/nuxt3. Currently based on node presrt and generates additional .output/server/prod.cjs with layer0 format and CommonJS wrapper.

Try with:

• Clone repo and follow contribution guide to setup
• Switch to feat/layer0-preset branch
• Build with NITRO_PRESET=layer0 yarn nitro build examples/hello-world and check examples/hello-world/.output

Questions:

• What would be deploy and preview commands for this?
• How we can detect running in Layer0 CI/CD to automatically enable preset? (see this. providers usually expose a distrinct environment variable)

/cc @tristanlee85

Future improvements:

Looking at routes.js, we can potentially auto genere this file from nitro route caching rules for edge-caching. I need more details how it works :)

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[tristanlee85]

Questions:

• What would be deploy and preview commands for this?
• How we can detect running in Layer0 CI/CD to automatically enable preset? (see this. providers usually expose a distrinct environment variable)

/cc @tristanlee85

Deploy command: Since this will have been built already with Nitro, it can be deployed with layer0 deploy --skipFramework to skip the framework build.

Preview command: I assume you are just wanting to run the production build locally? If that is the case, the command would be layer0 run --production.

I did try this locally, but got hung up on some error that I've been trying to debug:

 nitro git:(feat/layer0-preset) NITRO_PRESET=layer0 yarn nitro build examples/hello-world
✔ Generated public examples/hello-world/.output/public          nitro 13:41:39
start Building server...                                        nitro 13:41:39
start Writing server bundle...                                  nitro 13:41:39
✔ Server built                                                  nitro 13:41:39
  ├─ examples/hello-world/.output/server/package.json (346 B) (200 B gzip)
  ├─ examples/hello-world/.output/server/index.mjs (10.6 kB) (3.52 kB gzip)
  └─ examples/hello-world/.output/server/chunks/hello.mjs (133 B) (123 B gzip)
Σ Total size: 414 kB (105 kB gzip)
TypeError: input.replaceAll is not a function
    at rewriteRelativePaths (/Users/tristanlee/Projects/nitro/src/build.ts:156:18)
    at _build (/Users/tristanlee/Projects/nitro/src/build.ts:159:61)
    at async main (/Users/tristanlee/Projects/nitro/src/cli.ts:35:5)

[danielroe]

@tristanlee85 That should be now resolved, by #42. (Or you can use node 16 until you upgrade.)

[pi0]

I'm moving layer0 preset for now to a POC repository to avoid conflicts with nitro changes and also trying deployment easier. https://github.com/unjs/nitro-poc-layer0