added nvm instructions, new issues docs

Author: M-ZubairAhmed

CONTRIBUTING.md

@@ -12,43 +12,50 @@ Both of them are under very active development. This document provides non exhau
 Coderplex has adopted [Contributor Covenant](https://github.com/coderplex/coderplex/blob/docs-update/CODE_OF_CONDUCT.md) that we expect project participants to adhere to.
 
 ## Open Development
-All work related to web app takes place on Github itself. We use [Issues](https://github.com/coderplex/coderplex/issues) to track bugs, discuss ideas and work on improvements. [Projects](https://github.com/coderplex/coderplex/projects) are used to keep track of everything and is our project management app. We maintain [Wiki](https://github.com/coderplex/coderplex/wiki) for structuring our long term thoughts. Both maintainers and contributors sends a pull request which goes through the same review process. Whole process is as transparent as it can be and we strive to keep it that way.
+All work related to the application takes place on Github itself. We use [Issues](https://github.com/coderplex/coderplex/issues) to track bugs, discuss ideas and to engage open source contributors. [Projects](https://github.com/coderplex/coderplex/projects) are used to keep track of everything and is our project management tool. We maintain [Wiki](https://github.com/coderplex/coderplex/wiki) for structuring our long term thoughts. Both maintainers and contributors sends a pull request which goes through the same review process. Whole process is as transparent as it can be and we strive to keep it that way.
 
-## Contribution Prerequisites
-### NodeJS
-Minimum Node version v8.0.0+
+## Development Workflow
+
+We welcome pull requests from beginners and seasoned javaScript developers alike!
+
+### Work on Issues
+1. Find an issue that needs assistance by searching for the [open issues](https://github.com/coderplex/coderplex/labels/help-wanted).
+2. If you decide to fix an issue, please be sure to check the comment thread in case somebody is already working on a fix. If nobody is working on it at the moment, please leave a comment stating that you intend to work on it so other people don’t accidentally duplicate your effort.
+3. If somebody claims an issue but doesn’t follow up for more than a weeks, it’s fine to take over it but you should still leave a comment.
+
+
+### Proposing a Change
+1. Open a new issue if you would like report a bug or suggest improvements.
+2. Please wait for maintainers to comment on the thread. This lets us reach an agreement on your proposal before you put significant effort into it.
+
+### Prerequisites
+##### 1. [NodeJS](https://nodejs.org/)
+Minimum version v8.0.0+
 ```bash
 To check node version
 $ node -v
  ```
-##### Using a Version Manager
-If you prefer to keep LTS version or face problem updating your node then you might need a Node version manager tool.
-
-###### [nvm](https://github.com/creationix/nvm) for Linux & OSX
-```bash
-Install
-$ curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.6/install.sh | bash
-```
-*Make sure you have cURL installed*
-
-###### [nvm-windows](https://github.com/coreybutler/nvm-windows) for Windows
-It comes with a [installer](https://github.com/coreybutler/nvm-windows#installation--upgrades).
+Any lower version than mentioned above may results in this [error](https://github.com/coderplex/coderplex/issues/100).
 
+> If you face problem updating your node then you might need a Node version manager tool. [Follow here]()
 
+##### 2.[Yarn](https://yarnpkg.com)
+Minimum version v1.2.0+
+<br/>
+Installing instructions are at [official docs](https://yarnpkg.com/en/docs/install#windows-tab)
 
-We welcome pull requests from hackerspace members (our students) and seasoned JavaScript developers alike! Follow these steps to contribute:
+Use yarn over npm
+> Our team's official policy (for now) is: We only use [Yarn](https://yarnpkg.com/en/docs/install) as our official Node package manager, and so we request you to use Yarn instead of npm and commit `yarn.lock` file.
 
-1. Find an issue that needs assistance by searching for the [Help Wanted](https://github.com/coderplex/coderplex/labels/help-wanted) tag.
+##### 3. [GIT](https://git-scm.com/download/linux)
+Familiarity with git is mandatory.
 
-1. Let us know you are working on it by posting a comment on the issue.
-
-1. Follow the [Contribution Guidelines](#contribution-guidelines) to start working on the issue.
 
 Remember to feel free to ask for help in our [Discord](https://discordapp.com/invite/dVnQ2Gf) rooms.
 
 Working on your first Pull Request? You can learn how from this *free* series [How to Contribute to an Open Source Project on GitHub](https://egghead.io/series/how-to-contribute-to-an-open-source-project-on-github)
 
-## Running this project locally
+### Running locally
 
 1. Make sure you have [NodeJS](https://nodejs.org/) and [Yarn](https://yarnpkg.com/en/docs/install) installed.
     > Make sure you install node version 8 or above and check node version by running `node -v`
@@ -61,10 +68,37 @@ Working on your first Pull Request? You can learn how from this *free* series [H
 1. `npm run dev` to start local development server
 1. App opens at `localhost:3000`
 
-**Note:**
-> So our team's official policy (for now) is: We only use [Yarn](https://yarnpkg.com/en/docs/install) as our official Node package manager, and so we request you to use Yarn instead of npm and commit yarn.lock file.
-
 
 ## How to get in touch
 - [Coderplex Discord Channel](https://discord.gg/dVnQ2Gf)
 - Tweet maintainers
+
+## Appendix
+#### 1. Node Version Manager
+
+##### [nvm](https://github.com/creationix/nvm) for Linux & OSX
+```bash
+Installation
+$ curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.6/install.sh | bash
+
+Install latest node lts
+$ nvm install --lts
+
+Use installed version
+$ nvm use --lts
+
+Run the app in the same terminal session
+```
+*Make sure you have [curl](https://curl.haxx.se/) installed*
+
+##### [nvm-windows](https://github.com/coreybutler/nvm-windows) for Windows
+It comes with an [installer](https://github.com/coreybutler/nvm-windows#installation--upgrades).
+
+```bash
+Install particular version
+$ nvm install 8.9.1
+
+Use installed version
+$ nvm use 8.9.1
+```
+Still facing problem this [article](https://medium.com/appseed-io/how-to-run-multiple-versions-of-node-js-with-nvm-for-windows-ffbe5c7a2b47) from [@skounis  ](https://twitter.com/skounis) explain in details.