Introduce config.json-driven server config (#246)

* feat: implement JSON-based configuration system with env var overrides
- Add config.json support (replaces .env file dependency)
- Implement deepMerge and normalizeValue functions in loader.ts
- Support env:// syntax in JSON for runtime environment variable injection
- Add optional env var support with ? suffix (e.g., env://VAR_NAME?)
- Extract schema.ts to separate concerns (validation vs loading)
- Rename read*ConfigVariables to read*ConfigFromEnv for clarity
- Improve boolean env var parsing (handle false explicitly, not just truthy)
- Document configuration precedence: env > config.json > defaults
- Add config.json and config.local.json to .gitignore
- Update .env.example with migration guide for new system
- Maintain backward compatibility: env vars still work without JSON files
* - add docker compose and kuberenetes support for the new configuration flow.
- document config.json workflow for self-hosting
* update config json implementation

package-lock.json

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@@ -17289,7 +17286,6 @@
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@@ -27341,7 +27337,7 @@
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