[ERP-CLINICAS] feat: Setup backend build configuration

- Add package.json with Express, TypeORM, PostgreSQL dependencies
- Add tsconfig.json with TypeScript compiler options
- Update .gitignore with comprehensive exclusions
- Build validates successfully (28 TypeScript files)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.gitignore

@@ -1,4 +1,37 @@
+# Dependencies
 node_modules/
+
+# Build output
 dist/
-coverage/
+
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo
+
+# Logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Environment files
 .env
+.env.local
+.env.*.local
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Test coverage
+coverage/
+.nyc_output/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Temporary files
+tmp/
+temp/

package.json

@@ -0,0 +1,49 @@
+{
+  "name": "erp-clinicas-backend",
+  "version": "1.0.0",
+  "description": "Backend para ERP de Clínicas - Sistema de gestión de pacientes, citas y consultas",
+  "main": "dist/index.js",
+  "scripts": {
+    "build": "tsc",
+    "start": "node dist/index.js",
+    "dev": "ts-node-dev --respawn --transpile-only src/index.ts",
+    "lint": "eslint src/**/*.ts",
+    "typecheck": "tsc --noEmit"
+  },
+  "keywords": [
+    "erp",
+    "clinicas",
+    "healthcare",
+    "patients",
+    "appointments"
+  ],
+  "author": "ISEM",
+  "license": "UNLICENSED",
+  "private": true,
+  "dependencies": {
+    "express": "^4.18.2",
+    "typeorm": "^0.3.17",
+    "pg": "^8.11.3",
+    "reflect-metadata": "^0.1.13",
+    "dotenv": "^16.3.1",
+    "cors": "^2.8.5",
+    "helmet": "^7.1.0",
+    "class-validator": "^0.14.0",
+    "class-transformer": "^0.5.1"
+  },
+  "devDependencies": {
+    "typescript": "^5.3.3",
+    "@types/node": "^20.10.0",
+    "@types/express": "^4.17.21",
+    "@types/cors": "^2.8.17",
+    "@types/pg": "^8.10.9",
+    "ts-node": "^10.9.2",
+    "ts-node-dev": "^2.0.0",
+    "eslint": "^8.55.0",
+    "@typescript-eslint/parser": "^6.13.0",
+    "@typescript-eslint/eslint-plugin": "^6.13.0"
+  },
+  "engines": {
+    "node": ">=18.0.0"
+  }
+}

tsconfig.json

@@ -0,0 +1,30 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "commonjs",
+    "lib": ["ES2022"],
+    "outDir": "./dist",
+    "rootDir": "./src",
+    "strict": false,
+    "noImplicitAny": false,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true,
+    "resolveJsonModule": true,
+    "declaration": true,
+    "declarationMap": true,
+    "sourceMap": true,
+    "experimentalDecorators": true,
+    "emitDecoratorMetadata": true,
+    "strictPropertyInitialization": false,
+    "moduleResolution": "node",
+    "baseUrl": "./src",
+    "paths": {
+      "@config/*": ["config/*"],
+      "@modules/*": ["modules/*"],
+      "@shared/*": ["shared/*"]
+    }
+  },
+  "include": ["src/**/*"],
+  "exclude": ["node_modules", "dist"]
+}