have to add readme.md file for npmjs.

Author: OurCodeBase

README.md

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+# Gen3 Express
+A gen3 tool to generate express app boilerplate.
+
+## Acknowledgements
+You need to know atleast basics about these things.
+ - [NodeJS](https://nodejs.org/docs/latest/api/)
+ - [ExpressJS](https://expressjs.com/en/5x/api.html)
+ - [Embedded JS](https://ejs.co/)
+ 
+## Installation
+You can install and generate an express app using this tool in two approaches. Here I'm generating an app with name `my-app`, you can name to it anything you like.
+
+### 1. node package extecutor
+This method is highly recommended to generate an express app.
+```bash
+npx gen3-express my-app
+```
+
+### 2. node package manager
+Generation of an express app is not recommended through npm.
+```bash
+npm install -g gen3-express
+```
+```bash
+gen3-express my-app
+```
+
+## Documentation
+To install all dev dependencies goto the folder and hit `npm install` command.
+```bash
+cd my-app
+npm install
+```
+To start a dev server to preview page use `server` word.
+- Keep in mind that
+- The below command does not include EJS live reloading.
+
+```bash
+npm run server
+```
+To start a dev server to live preview EJS page use `sync` word.
+```bash
+npm run sync
+```
+If you want to run all these servers together then you should to use this below command, this command will provide you hot reloadings in every place.
+```bash
+npm run server & npm run sync
+```
+
+## File Cases
+To know about the product or project structure read about files included in this code block.
+
+```bash
+.
+├── app.js
+├── package.json
+├── public
+│   ├── css
+│   │   └── style.css
+│   └── fonts
+│       └── sans.woff
+├── sync.js # configuration for hot reloadings in ejs and static files.
+├── utils
+│   └── netface.js # contains functions to show available ipv4 addresses.
+└── views
+    └── home.ejs
+```
+
+## Roadmap
+
+- Custom name in `package.json` file ✅
+- Excellent terminal user interface ✅
+- Prompt `package.json` file's details from user. ⏩ 
+- Post this project to npmjs website. ✅
+- Custom local template feature ⏩
+
+## Authors
+- [@OurCodeBase](https://www.github.com/OurCodeBase)
+
+## Contributing
+Contributions are always welcome!