• NodeJs - as server side application representing APIs.
• Express - used as a framework on node to enable creating routes and APIs in an easy way.
• Api ai - as Dialogflow SDK , plugin allows integrating agents from the dialogflow natural language processing service with Node.js application.
• Helmet - helpers for more secure in Express application.
• Uuid - universally unique identifier - for dialogflow client sessions.

• REST API is a software architectural style that defines a set of constraints to be used for creating Web services
• The MVC Design Pattern is one of the oldest architectural pattern for web applications.

• you have to install NodeJS as it's the service and also to use its package manager npm.

• clone or download this project.
• open CMD or Terminal in this folder.
• write this command npm install or just npm i to install dependencies.
• then add your data in the '.env' file .
• now write npm run start in the terminal to run the api and can test with postman or integrate with any front-end framework/library/template engine.

Here we have two routes ;

• / : it's a GET request , just for say hello to the users ..
• /client : it's a POST request , sould be put the client message in msg variable or change the name of variable in src/controllers/chatbot.js - ligne 51 then received the chatbot answer after few milliseconds ..

• convert this project to node package ( cli pakcage can generate this code ) ..
• create frontend projects for this api ..