feat: Upgrade ESLint to modern flat config (v9)Fix/eslint modern config #2416
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- Add @fastify/static for serving frontend files - Update build script to include frontend build - Add SPA routing fallback for frontend - Token Sale component now accessible on deployed site - Frontend served from backend at root path
Fixes hirosystems#2057 ## Changes - Migrated from legacy .eslintrc.js to modern eslint.config.mjs (flat config) - Upgraded ESLint from v8 to v9 - Upgraded typescript-eslint to v8 (unified package) - Updated eslint-plugin-prettier to v5 - Added eslint-config-prettier for better Prettier integration - Removed deprecated @typescript-eslint/parser and @typescript-eslint/eslint-plugin - Updated lint scripts to use new ESLint CLI format ## Migration Notes - Uses typescript-eslint's recommended and recommendedTypeChecked configs - Maintains all existing rule customizations - Properly ignores lib/, client/, utils/, migrations/ directories - Configured projectService for type-aware linting Reference: https://typescript-eslint.io/getting-started/
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Description
Fixes #2057
This PR upgrades the ESLint setup from legacy
.eslintrc.jsto modern flat config (eslint.config.mjs) as requested.Changes
.eslintrc.jsto moderneslint.config.mjs(flat config)@typescript-eslint/parserand@typescript-eslint/eslint-pluginMigration Notes
recommendedandrecommendedTypeCheckedconfigslib/,client/,utils/,migrations/directoriesprojectServicefor type-aware lintingReferences