build(backend): set up TypeScript with strict mode and build script

TODO.md

@@ -9,7 +9,7 @@
 
 ### Backend Setup
 - [x] Initialize Node.js backend: Create src/backend/, package.json with express, better-sqlite3, zod, vitest. Create src/backend/index.ts with "Hello World" server on port 3000. Verify: npm install && npm run dev (server starts). Commit as "feat(backend): initialize Node.js project with Express"
-- [ ] Set up TypeScript: Create tsconfig.json (strict mode, ES2022, Node16 module resolution). Add build script to package.json. Verify: npm run build succeeds. Commit.
+- [x] Set up TypeScript: Create tsconfig.json (strict mode, ES2022, Node16 module resolution). Add build script to package.json. Verify: npm run build succeeds. Commit.
 - [ ] Create SQLite schema: Create src/backend/db/schema.sql with recipes, tags, recipe_tags tables per ARCHITECTURE.md. Create src/backend/db/migrate.ts to apply schema. Verify: npm run migrate creates data/recipes.db. Commit.
 - [ ] Implement recipe CRUD API endpoints
 - [ ] Add Zod validation schemas

package.json

@@ -6,6 +6,7 @@
   "main": "src/backend/index.ts",
   "scripts": {
     "dev": "ts-node src/backend/index.ts",
+    "build": "tsc",
     "test": "vitest",
     "migrate": "ts-node-esm src/backend/db/migrate.ts"
   },

tsconfig.json

@@ -3,12 +3,14 @@
     "target": "ES2022",
     "module": "Node16",
     "lib": ["ES2022"],
+    "rootDir": "src",
+    "outDir": "dist",
     "strict": true,
+    "moduleResolution": "Node16",
     "esModuleInterop": true,
     "skipLibCheck": true,
-    "forceConsistentCasingInFileNames": true,
-    "moduleResolution": "Node16",
-    "outDir": "dist"
+    "forceConsistentCasingInFileNames": true
   },
-  "include": ["src/**/*.ts"]
+  "include": ["src"],
+  "exclude": ["node_modules", "dist"]
 }