Merge pull request #4 from InfyDex/issue-2

#2 Add readme for functionalities and usecases

Author: cksharma11

README.md

@@ -1,2 +1,69 @@
-# nestjs-starter-kit
-NestJs starter kit with middleware and validators 
+## NestJs Starter Kit
+
+### Overview
+
+- NestJs starter git with basic middlewares ex. logging, response structure, tracing, validation and more.
+
+- Basic setup with mysql database
+
+- Docker-compose for setting up environment
+
+### Getting Started
+```
+npm install
+```
+
+```
+npm run start:dev
+```
+
+## .env
+create a .env file in the root directory with the below variables
+```
+POSTGRES_HOST=localhost
+POSTGRES_PORT=3306
+POSTGRES_USER=user
+POSTGRES_DATABASE=db
+POSTGRES_PASSWORD=password
+```
+### Swagger documentation
+Swagger documentation gets automatically generates, you just need to follow the conventions of entity creation.
+
+swagger url - http://localhost:3000/docs
+
+run e2e tests </br>
+```
+npm run test:e2e
+```
+
+### Creating new module
+
+To create a new module we need few things in place, we can do it either via nest-cli or manually.
+
+structure </br>
+module -> </br>
+1. *dto* -> dto_file (filename.dto.ts) (one or more)</br>
+Here you define your data structure to be received in request body
+2. *entity* -> entity_files (filename.entity.ts) (one or more)
+Here you define the db schema for an entity, nest picks it up and creates a table in your database using the schema defined. 
+3. *module controller file* (module.controller.ts)
+Here you define your routing paths and methods to generate swagger docs for your defined path, use the ApiResponse module from swagger-ui, it will generate docs automatically for you.
+4. *module service file* (module.service.ts) </br>
+This is repository for the controllers where you call db functions.
+</br>
+
+Note: Remember to add any new module you have created in app.module file otherwise nest will not pickup your new module changes.
+
+### pre-commit
+In pre-commit we are using husky as pre-commit so no need to define any pre-commit file inside .git/config folder
+you can refer what's inside hook by looking package.json file, look for husky.
+
+### Docker-compose
+It's to run the application standalone in any environment, currently it's defines postgres as dependency and uses it's port to servce the db
+</br>
+
+*using docker-compose* </br>
+
+`docker-compose up`
+
+### Open issues