feat(plt-998): create coding best practices Next.js website

.eslintrc.json

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+{
+  "extends": "next/core-web-vitals"
+}

.gitignore

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+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+.yarn/install-state.gz
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# local env files
+.env*.local
+
+# vercel
+.vercel
+
+# typescript
+*.tsbuildinfo
+next-env.d.ts

README.md

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+# Coding Best Practices
+
+A practical, open-source reference for writing clean, maintainable, and professional software.
+
+Built with [Next.js 14](https://nextjs.org/) and TypeScript.
+
+## Topics
+
+- ✨ Clean Code — naming, functions, DRY, magic numbers
+- 🏗️ SOLID Principles — SRP, OCP, LSP, ISP, DIP
+- 🔀 Git Workflow — atomic commits, conventional commits, branch hygiene
+- 🧪 Testing — test pyramid, AAA pattern, test naming
+- 👁️ Code Review — giving & receiving feedback, PR size
+- ⚡ Performance — profiling, N+1 queries, caching
+
+## Getting Started
+
+```bash
+npm install
+npm run dev
+```
+
+Open [http://localhost:3000](http://localhost:3000).
+
+## Running Tests
+
+```bash
+npm test
+```
+
+## Building for Production
+
+```bash
+npm run build
+npm start
+```
+
+## License
+
+MIT

jest.config.js

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+const nextJest = require('next/jest')
+
+const createJestConfig = nextJest({
+  dir: './',
+})
+
+const customJestConfig = {
+  setupFilesAfterEnv: ['<rootDir>/jest.setup.js'],
+  testEnvironment: 'jest-environment-jsdom',
+}
+
+module.exports = createJestConfig(customJestConfig)

jest.setup.js

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+import '@testing-library/jest-dom'

next.config.mjs

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+/** @type {import('next').NextConfig} */
+const nextConfig = {};
+
+export default nextConfig;