first commit backend

backend/.gitignore

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+node_modules/
+key/
+.env
+dist/
+
+/postgres
+/src/generated/prisma

backend/package.json

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+{
+  "name": "backend",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "dev": "tsx watch src/app.ts",
+    "build": "tsc",
+    "start": "node dist/app.js"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "type": "module",
+  "devDependencies": {
+    "@types/express": "^5.0.6",
+    "@types/node": "^25.9.1",
+    "rimraf": "^6.1.3",
+    "tsx": "^4.22.3",
+    "typescript": "^5.9.3"
+  },
+  "dependencies": {
+    "dotenv": "^17.4.2",
+    "env-var": "^7.5.0",
+    "express": "^5.2.1"
+  }
+}

backend/src/app.ts

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+import express from 'express';
+
+const app = express();
+const port = process.env.PORT ?? 3000;
+
+app.use(express.json());
+
+app.get('/', (_req, res) => {
+  res.json({
+    message: 'API funcionando con Express + TypeScript + TSX',
+  });
+});
+
+app.listen(port, () => {
+  console.log(`Servidor corriendo en http://localhost:${port}`);
+});

backend/tsconfig.json

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+{
+  // Visit https://aka.ms/tsconfig to read more about this file
+  "compilerOptions": {
+    // File Layout
+    "rootDir": "src",
+    "outDir": "dist",
+
+    // Environment Settings
+    // See also https://aka.ms/tsconfig/module
+    "module": "nodenext",
+    "target": "esnext",
+    "types": ["node"],
+    // For nodejs:
+    // "lib": ["esnext"],
+    // "types": ["node"],
+    // and npm install -D @types/node
+
+    // Other Outputs
+    "sourceMap": true,
+    "declaration": true,
+    "declarationMap": true,
+
+    // Stricter Typechecking Options
+    "noUncheckedIndexedAccess": true,
+    "exactOptionalPropertyTypes": true,
+
+    // Style Options
+    // "noImplicitReturns": true,
+    // "noImplicitOverride": true,
+    // "noUnusedLocals": true,
+    // "noUnusedParameters": true,
+    // "noFallthroughCasesInSwitch": true,
+    // "noPropertyAccessFromIndexSignature": true,
+
+    // Recommended Options
+    "strict": true,
+    "jsx": "react-jsx",
+    "verbatimModuleSyntax": false,
+    "isolatedModules": true,
+    "noUncheckedSideEffectImports": true,
+    "moduleDetection": "force",
+    "skipLibCheck": true,
+  },
+  "exclude": ["node_modules", "dist", "prisma.config.ts"],
+  "include": ["src/**/*.ts"]
+}