aghosh0605 / commercial-billing-system

An online billing system is essential for businesses to manage their invoicing, payments, and financial transactions efficiently. A Node.js server for a billing system that provides seamless functionality and a user-friendly experience.

plotline-billing-system

An online billing system is essential for businesses to manage their invoicing, payments, and financial transactions efficiently. A Node.js server for a billing system that provides seamless functionality and a user-friendly experience.

Check the problem statement here

Prerequisite

• Node 16
• Yarn

Nice to have

• NVM
• VS Code
• VS Code ESLint extension

Getting started

• Clone the repository

git clone https://github.com/aghosh0605/plotline-billing-system.git

• Install dependencies

cd plotline-billing-system
yarn

• Run local development server

yarn run dev

• Healthcheck Routes

GET /api/v1
GET /api/v1/health
GET /api/v1/health/debug #Need to be logged in to check

• To use ESLint and to fix lint errors

yarn run lint

• To build and run tests

yarn test

ENV variables

The project uses dotenv to parse environment variables. To add environment variables to your project, simply, create a .env file in the root folder of the project. You can then reference .env.example to know more about all environment variables. For example, to change Node.js mode, simply add NODE_ENV=production or NODE_ENV=development to your .env file to change Node.js mode to production or development accordingly.

Remeber: it's not a good idea to push .env files to your repo!

Logging

This project uses Winston and Morgan for logging. Winston is exported as a logger and can be used to log custom messages on demand. Also, it can be extended to push logs to files, external database, or any logging service.

Morgan is used as an http logger middleware for Express and the logs are routed through Winston, so everything is nicely bundled in one log stream.

All of these logs are written to console during development. Feel free to add production-specific loggers as and when needed.

Important Instructions for Docker

1. Build an image of the NodeJS App with the help of the Dockerfile

docker build . -t aghosh0605/plotline-billing-system

2. Start the Docker image with the following command to start the App within a Docker container

docker run -p 8080:8080 -d --name plotline-billing-system aghosh0605/plotline-billing-system

3. Stop the Docker container with the following command to stop the App

docker ps #Note down the CONTAINER ID
docker kill <CONTAINER ID> #To kill the container
docker start plotline-billing-system #To start the container again

4. Remove the docker container from the system with the following command

docker ps -a  #Keep note of container ID
docker rm <CONTAINER ID> #Remove the docker container
docker rm -f plotline-billing-system #To stop and remove container in a single command

5. At last now to delete the docker image from the system follow the command

docker image remove aghosh0605/plotline-billing-system

Project structure

plotline-billing-system
├─ .editorconfig
├─ .eslintrc.json
├─ .github
│  └─ workflows
│     └─ build-test.yml
├─ .gitignore
├─ .nvmrc
├─ Dockerfile
├─ README.md
├─ jest.config.ts
├─ yarn.lock
├─ package.json
├─ src
│  ├─ common
│  ├─ controllers
│  ├─ index.ts
│  ├─ app.ts
│  ├─ data-source.ts
│  ├─ middleware
│  ├─ routers
│  ├─ entity
│  ├─ migration
│  ├─ validators
│  └─ services
├─ tests
├─ tsconfig.json
└─ types

General Debug Options for Developers

• If there is jest errors coming up with open handlers use in package.json within the test script.

jest --detectOpenHandles

• If test cases use database that is a slow process then use testTimeout: 30000 in jest.config.ts