feat(express backend): basic structure implemented

back-express/.gitignore

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+# Created by https://www.toptal.com/developers/gitignore/api/node
+# Edit at https://www.toptal.com/developers/gitignore?templates=node
+
+### Node ###
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+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 test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+web_modules/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional stylelint cache
+.stylelintcache
+
+# Microbundle cache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+.parcel-cache
+
+# Next.js build output
+.next
+out
+
+# Nuxt.js build / generate output
+.nuxt
+dist
+
+# Gatsby files
+.cache/
+# Comment in the public line in if your project uses Gatsby and not Next.js
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# public
+
+# vuepress build output
+.vuepress/dist
+
+# vuepress v2.x temp and cache directory
+.temp
+
+# Docusaurus cache and generated files
+.docusaurus
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# TernJS port file
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+.vscode-test
+
+# yarn v2
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*
+
+### Node Patch ###
+# Serverless Webpack directories
+.webpack/
+
+# Optional stylelint cache
+
+# SvelteKit build / generate output
+.svelte-kit
+
+# End of https://www.toptal.com/developers/gitignore/api/node

back-express/package.json

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+{
+  "name": "express-backend",
+  "version": "1.0.0",
+  "scripts": {
+    "dev": "nodemon src/app.ts",
+    "start": "ts-node src/app.ts",
+    "build": "tsc",
+    "serve": "node dist/app.js"
+  },
+  "author": "Daniel Heras Quesada",
+  "license": "ISC",
+  "description": "",
+  "devDependencies": {
+    "@types/cors": "^2.8.17",
+    "@types/express": "^5.0.0",
+    "@types/node": "^22.7.4",
+    "express": "^4.21.0",
+    "nodemon": "^3.1.7",
+    "ts-node": "^10.9.2",
+    "typescript": "^5.6.2"
+  },
+  "dependencies": {
+    "cors": "^2.8.5",
+    "dotenv": "^16.4.5"
+  }
+}

back-express/src/app.ts

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+import express, { Request, Response } from "express";
+import config from "./config";
+import cors from "cors";
+
+const app = express();
+const port = config.port;
+
+if (config.enableCors) {
+  app.use(cors());
+}
+
+app.use((req, res, next) => {
+  console.log(`${req.method} request for ${req.url}`);
+  next();
+});
+
+app.get("/", (req: Request, res: Response) => {
+  res.send("Hello, TypeScript Express!");
+});
+
+app.listen(port, () => {
+  console.log(`Server running at http://localhost:${port}`);
+});

back-express/src/config.ts

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+import { configDotenv } from "dotenv";
+
+configDotenv();
+
+const config = {
+  enableCors: false,
+  port: process.env.PORT || 3000,
+};
+
+export default config;

back-express/tsconfig.json

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+{
+  "compilerOptions": {
+    "target": "es6",
+    "module": "commonjs",
+    "outDir": "./dist",
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true
+  },
+  "include": [
+    "src/**/*.ts"
+  ],
+  "exclude": [
+    "node_modules"
+  ]
+}