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refactor: update package.json and server.js for Lemoncode frontend
- Renamed project to "lemoncode-frontend" and updated description. - Changed main entry point to "server.js". - Updated Node.js engine compatibility to include versions 18.x and 20.x. - Added start and dev scripts for running the server. - Added Jest as a testing framework and created test scripts. - Updated dependencies: ejs to version 3.1.10 and express to version 4.19.2. - Removed dynamic import for node-fetch in server.js.
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‎.gitignore‎

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01-contenedores/lemoncode-challenge/dotnet-stack/backend/obj/Debug/netcoreapp3.1/backend.AssemblyInfo.cs
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01-contenedores/lemoncode-challenge/dotnet-stack/backend/obj/Debug/netcoreapp3.1/backend.GeneratedMSBuildEditorConfig.editorconfig
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01-contenedores/lemoncode-challenge/dotnet-stack/backend/obj/Debug/netcoreapp3.1/backend.AssemblyInfo.cs
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01-contenedores/lemoncode-challenge/node-stack/backend/CHALLENGE.md

‎01-contenedores/lemoncode-challenge/node-stack/backend/app.js‎

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require('dotenv').config();
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const express = require('express');
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const cors = require('cors');
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const { MongoClient, ObjectId } = require('mongodb');
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const app = express();
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// ============================================
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// CONFIGURACIÓN
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// ============================================
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const DB_URL = process.env.DATABASE_URL || 'mongodb://localhost:27017';
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const DB_NAME = process.env.DATABASE_NAME || 'TopicstoreDb';
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const HOST = process.env.HOST || '0.0.0.0';
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const PORT = 5001;
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let db;
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let topicsCollection;
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let mongoClient;
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// ============================================
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// MIDDLEWARES
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// ============================================
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app.use(cors());
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app.use(express.json());
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app.use(express.urlencoded({ extended: true }));
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// ============================================
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// CONEXIÓN A MONGODB
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// ============================================
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async function connectDB() {
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try {
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console.log('🔄 Conectando a MongoDB...');
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mongoClient = new MongoClient(DB_URL);
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await mongoClient.connect();
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console.log('✅ Conexión a MongoDB exitosa');
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db = mongoClient.db(DB_NAME);
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topicsCollection = db.collection('Topics');
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console.log('📋 Colección Topics cargada');
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} catch (error) {
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console.error('❌ Error al conectar a MongoDB:', error.message);
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process.exit(1);
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}
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}
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// ============================================
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// RUTAS - TOPICS
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// ============================================
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// GET /api/topics - Obtener todos los tópicos
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app.get('/api/topics', async (req, res) => {
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try {
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console.log('📥 GET /api/topics');
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const topics = await topicsCollection.find({}).toArray();
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console.log(`✅ Se obtuvieron ${topics.length} tópicos`);
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res.json(topics);
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} catch (error) {
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console.error('❌ Error al obtener tópicos:', error.message);
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res.status(500).json({ error: 'Error al obtener tópicos' });
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}
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});
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// GET /api/topics/:id - Obtener un tópico por ID
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app.get('/api/topics/:id', async (req, res) => {
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try {
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const { id } = req.params;
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console.log(`📥 GET /api/topics/${id}`);
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if (!ObjectId.isValid(id)) {
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return res.status(400).json({ error: 'ID inválido' });
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}
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const topic = await topicsCollection.findOne({ _id: new ObjectId(id) });
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if (!topic) {
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return res.status(404).json({ error: 'Tópico no encontrado' });
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}
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console.log(`✅ Tópico ${id} obtenido`);
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res.json(topic);
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} catch (error) {
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console.error('❌ Error al obtener tópico:', error.message);
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res.status(500).json({ error: 'Error al obtener tópico' });
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}
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});
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// POST /api/topics - Crear un nuevo tópico
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app.post('/api/topics', async (req, res) => {
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try {
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const topic = req.body;
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console.log(`📥 POST /api/topics - ${JSON.stringify(topic)}`);
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if (!topic.Name) {
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return res.status(400).json({ error: 'El campo Name es requerido' });
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}
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const result = await topicsCollection.insertOne(topic);
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const createdTopic = { _id: result.insertedId, ...topic };
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console.log(`✅ Tópico creado: ${topic.Name}`);
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res.status(201).json(createdTopic);
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} catch (error) {
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console.error('❌ Error al crear tópico:', error.message);
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res.status(500).json({ error: 'Error al crear tópico' });
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}
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});
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// PUT /api/topics/:id - Actualizar un tópico
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app.put('/api/topics/:id', async (req, res) => {
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try {
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const { id } = req.params;
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const topic = req.body;
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console.log(`📥 PUT /api/topics/${id} - ${JSON.stringify(topic)}`);
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if (!ObjectId.isValid(id)) {
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return res.status(400).json({ error: 'ID inválido' });
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}
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const result = await topicsCollection.updateOne(
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{ _id: new ObjectId(id) },
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{ $set: topic }
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);
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if (result.matchedCount === 0) {
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return res.status(404).json({ error: 'Tópico no encontrado' });
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}
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console.log(`✅ Tópico ${id} actualizado`);
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res.json({ _id: id, ...topic });
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} catch (error) {
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console.error('❌ Error al actualizar tópico:', error.message);
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res.status(500).json({ error: 'Error al actualizar tópico' });
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}
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});
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// DELETE /api/topics/:id - Eliminar un tópico
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app.delete('/api/topics/:id', async (req, res) => {
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try {
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const { id } = req.params;
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console.log(`📥 DELETE /api/topics/${id}`);
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if (!ObjectId.isValid(id)) {
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return res.status(400).json({ error: 'ID inválido' });
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}
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const result = await topicsCollection.deleteOne({ _id: new ObjectId(id) });
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if (result.deletedCount === 0) {
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return res.status(404).json({ error: 'Tópico no encontrado' });
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}
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console.log(`✅ Tópico ${id} eliminado`);
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res.status(204).send();
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} catch (error) {
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console.error('❌ Error al eliminar tópico:', error.message);
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res.status(500).json({ error: 'Error al eliminar tópico' });
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}
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});
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// ============================================
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// INICIAR SERVIDOR
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// ============================================
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async function startServer() {
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try {
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console.log('\n🔧 Inicializando backend...');
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await connectDB();
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app.listen(PORT, HOST, () => {
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const url = `http://${HOST === '0.0.0.0' ? 'localhost' : HOST}:${PORT}`;
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console.log('');
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console.log('═══════════════════════════════════════════════════════════════');
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console.log(`🚀 Servidor ejecutándose en: ${url}/api/topics`);
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console.log('═══════════════════════════════════════════════════════════════');
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console.log('');
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});
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} catch (error) {
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console.error('❌ Error al iniciar servidor:', error.message);
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process.exit(1);
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}
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}
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// Iniciar la aplicación
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startServer();
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// Manejo de cierre graceful
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process.on('SIGTERM', async () => {
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console.log('\n🛑 Recibido SIGTERM, cerrando gracefully...');
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if (mongoClient) {
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await mongoClient.close();
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console.log('✅ Conexión a MongoDB cerrada');
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}
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process.exit(0);
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});

‎01-contenedores/lemoncode-challenge/node-stack/backend/client.http‎

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@baseUrl = http://localhost:5001/api
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@contentType = application/json
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###
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# ============================================
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# GET - Obtener todos los tópicos
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# ============================================
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GET {{baseUrl}}/topics
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###
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# ============================================
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# POST - Crear un nuevo tópico
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# ============================================
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POST {{baseUrl}}/topics
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Content-Type: {{contentType}}
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{
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"Name": "Docker"
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}
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###
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# ============================================
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# POST - Crear otro tópico
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# ============================================
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POST {{baseUrl}}/topics
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Content-Type: {{contentType}}
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{
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"Name": "Kubernetes"
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}
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###
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# ============================================
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# POST - Crear otro tópico
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# ============================================
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POST {{baseUrl}}/topics
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Content-Type: {{contentType}}
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{
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"Name": "DevOps"
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}
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###
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# ============================================
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# GET - Obtener un tópico específico (sustituir ID)
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# Nota: Copia el _id de una respuesta anterior
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# ============================================
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GET {{baseUrl}}/topics/PASTE_ID_HERE
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###
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# ============================================
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# PUT - Actualizar un tópico (sustituir ID)
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# Nota: Copia el _id de una respuesta anterior
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# ============================================
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PUT {{baseUrl}}/topics/PASTE_ID_HERE
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Content-Type: {{contentType}}
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{
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"Name": "Docker Updated"
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}
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###
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# ============================================
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# DELETE - Eliminar un tópico (sustituir ID)
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# Nota: Copia el _id de una respuesta anterior
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# ============================================
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DELETE {{baseUrl}}/topics/PASTE_ID_HERE

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