custom api path

[inetol]

enh: robots.txt for standalone backends
enh: expose instance info in .well-known
enh: move transpilation to oxc
enh: static file imports
feat: custom api path

[Copilot]

Pull request overview

This PR makes the backend’s API prefix configurable via an environment variable, adds “meta” endpoints for robots.txt and instance info under /.well-known, and continues the move toward bundling-friendly static imports (SQL/text) while adjusting the rolldown Deno plugin configuration.

Changes:

• Add JSPB_API env var and use it as the base path for API routes and OpenAPI JSON.
• Introduce meta endpoints: GET /robots.txt and GET /.well-known/jspaste.
• Switch DB migrations to static .sql text imports and tweak rolldown Deno plugin settings.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/utils/env.ts	Adds JSPB_API env var with validation/normalization for API prefixing.
src/http/handler.ts	Mounts meta endpoints at root and moves API routing + OpenAPI JSON under env.JSPB_API.
src/endpoints/meta/index.ts	Composes meta endpoints into a single handler.
src/endpoints/meta/robots.ts	Serves robots.txt via a raw text import.
src/endpoints/meta/robots.txt	Adds a restrictive robots.txt for standalone backends.
src/endpoints/meta/wellKnown.ts	Exposes instance configuration info via /.well-known/jspaste.
src/database/migration.ts	Uses static imports for SQL migration scripts instead of dynamic imports.
rolldown.config.ts	Adjusts Deno rolldown plugin configuration (notably noTranspile).
.env.example	Documents the new JSPB_API setting and .well-known discovery.

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