Food Delivery App Backend

Overview

This project consists of three microservices for a food delivery app: User Service, Restaurant Service, and Delivery Agent Service.

Microservices

1. User Service
2. Restaurant Service
3. Delivery Agent Service

Tech Stack

• Node.js
• JavaScript
• Docker
• Docker Compose
• PostgreSQL (for the database)

Prerequisites

• Docker
• Docker Compose
• Node.js

Setup

Cloning the Repository

Clone the repository:

git clone https://github.com/sagnik3788/microservices-backend.git
cd microservices-backend/food-delivery-app

Environment Variables

Create a .env file in each service directory (user-service, restaurant-service, delivery-agent-service) with the following content:

DB_NAME=food_delivery
DB_USER=postgres
DB_PASS=Sagnik@09
DB_HOST=postgres
DB_PORT=5432

Installing Dependencies Before running the services, ensure you have installed all the necessary dependencies. Navigate to each service directory and run npm install:

Navigate to user-service and install dependencies

cd user-service
npm install
npm install express sequelize pg pg-hstore nodemon dotenv

# Navigate to restaurant-service and install dependencies
cd ../restaurant-service
npm install
npm install express sequelize pg pg-hstore nodemon dotenv

# Navigate to delivery-agent-service and install dependencies
cd ../delivery-agent-service
npm install
npm install express sequelize pg pg-hstore nodemon dotenv
# Return to the root directory
cd ..

Run the Docker Compose file to start all the services:

docker-compose up --build

This command will build and start the Docker containers for each microservice and the PostgreSQL database.

Accessing the Services The services will be available at the following ports:

• User Service: http://localhost:3000
• Restaurant Service: http://localhost:3001
• Delivery Agent Service: http://localhost:3002

Project Structure

Project Structure

food-delivery-app/
├── user-service/
│   ├── models/
│   │   ├── User.js
│   │   ├── Order.js
│   │   ├── Rating.js
│   ├── routes/
│   │   ├── index.js
│   ├── database.js
│   ├── app.js
│   ├── Dockerfile
│   ├── package.json
│   └── .env
├── restaurant-service/
│   ├── models/
│   │   ├── Restaurant.js
│   │   ├── Order.js
│   │   ├── DeliveryAgent.js
│   ├── routes/
│   │   ├── index.js
│   ├── database.js
│   ├── app.js
│   ├── Dockerfile
│   ├── package.json
│   └── .env
├── delivery-agent-service/
│   ├── models/
│   │   ├── DeliveryAgent.js
│   │   ├── Order.js
│   ├── routes/
│   │   ├── index.js
│   ├── database.js
│   ├── app.js
│   ├── Dockerfile
│   ├── package.json
│   └── .env
├── docker-compose.yml
├── README.md

Postman Documentation

For detailed API documentation and testing, refer to the Postman collection here (Replace # with the actual link to your Postman collection).

Why This Project is Not Deployed

This project uses PostgreSQL running locally, which makes it unsuitable for deployment on platforms like Render or Heroku that require an external database connection. The primary reason for not using AWS RDS for PostgreSQL is the high cost associated with AWS RDS services. As a result, this setup is optimized for local development and testing.

Building and starting services:

docker-compose up --build

Stopping services:

docker-compose down

Viewing logs:

docker-compose logs -f

Notes Ensure Docker and Docker Compose are installed and running on your machine. The .env files are crucial for connecting to the PostgreSQL database.