Update Railpack to 0.23.0

[FluxCapacitor2]

Update Railpack to version 0.23.0. This pull request was automatically created by .github/workflows/update-railpack.yml.

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Release Notes

Providers

New

• Staticfile: Added a configurable index fallback to the Staticfile provider, allowing users to toggle SPA-style routing for their applications. by @iloveitaly in feat: add configurable index fallback for static files railwayapp/railpack#534
  To enable SPA routing, add index_fallback: true to your Staticfile configuration to have non-existent paths served by index.html.

CLI

New

• Mise: Updated mise version from v2026.3.15 to v2026.3.17. in chore: mise update 2026.3.17 railwayapp/railpack#539
• Mise: Introduced a new installation policy that defaults to tool versions released at least 14 days ago to avoid broken or incomplete tool versions. by @iloveitaly in feat: 14d delay on new mise packages railwayapp/railpack#540
  This setting improves stability for runtime environments like Python and Ruby by allowing upstream releases time to stabilize before they are used in production builds.
• Verbose Mode: Added support for the RAILPACK_VERBOSE environment variable to enable verbose logging and improved debug logs for mise execution. by @iloveitaly in feat(cli): support RAILPACK_VERBOSE and improve mise debug logging railwayapp/railpack#536
  Set RAILPACK_VERBOSE=1 to enable detailed debug output, including the full command string and captured output from mise during execution.

Fixed

• Configuration: Improved root directory detection by trimming whitespace from environment variables and configuration values. by @iloveitaly in feat: add configurable index fallback for static files railwayapp/railpack#534

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Internal improvements to testing and documentation by @iloveitaly.

Full Changelog: railwayapp/railpack@v0.22.2...v0.23.0