Task/coding challenge

.env.example

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+DATABASE_URL="file:./dev.db"
+PORT=6000
+NODE_ENV=development

.gitignore

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+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+# Diagnostic reports (Crashed node processes)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc coverage directory
+.nyc_output
+
+# Grunt string cache
+.grunt
+
+# Bower dependency directory (legacy)
+bower_components
+
+# node-modules (Crucial: never commit dependencies)
+node_modules/
+jspm_packages/
+
+# TypeScript build outputs
+dist/
+out/
+tsconfig.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional stylelint cache
+.stylelintcache
+
+# Microbundle cache
+.rts2_cache_development
+.rts2_cache_production
+.rts2_cache_placeholder
+
+# REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variable files (CRITICAL: Never leak your secrets to GitHub!)
+.env
+.env.development
+.env.local
+.env.production
+.env.test
+.env.dev
+.env.prod
+.env*.local
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# IDEs and editors
+.idea/
+.vscode/
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?
+
+patterns.txtnode_modules
+node_modules
+
+/src/generated/prisma
+
+/generated/prisma

jest.config.js

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+// jest.config.mjs
+import { createDefaultPreset } from 'ts-jest';
+
+const tsJestTransformCfg = createDefaultPreset().transform;
+
+export default {
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+  extensionsToTreatAsEsm: ['.ts'],
+  transform: {
+    ...tsJestTransformCfg,
+  },
+  moduleNameMapper: {
+    '^(\\.{1,2}/.*)\\.js$': '$1',
+  },
+};

package.json

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+{
+  "name": "code-challenge",
+  "version": "1.0.0",
+  "type": "module",
+  "scripts": {
+    "test": "node --experimental-vm-modules node_modules/jest/bin/jest.js",
+    "build": "tsc",
+    "start": "tsx src/problem4/sum_to_n.ts",
+    "dev": "nodemon --watch src --ext ts,js --exec tsx --env-file=.env src/problem5/src/server.ts"
+    },
+  "private": true,
+  "packageManager": "pnpm@10.14.0",
+  "devDependencies": {
+    "@prisma/client": "^7.8.0",
+    "@types/better-sqlite3": "^7.6.13",
+    "@types/express": "^5.0.6",
+    "@types/jest": "^30.0.0",
+    "@types/node": "^25.9.3",
+    "jest": "^30.4.2",
+    "nodemon": "^3.1.14",
+    "prisma": "^7.8.0",
+    "ts-jest": "^29.4.11",
+    "ts-node": "^10.9.2",
+    "tsx": "^4.22.4",
+    "typescript": "^6.0.3"
+  },
+  "dependencies": {
+    "@prisma/adapter-better-sqlite3": "^7.8.0",
+    "dotenv": "^17.4.2",
+    "express": "^5.2.1",
+    "zod": "^4.4.3"
+  }
+}