Add my contributions.md and contributing guidelines

ContributingGuidelines.md

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+## Steps to follow :
+
+### 1. Fork it :
+
+You can get your own fork/copy of [internship](https://github.com/coderplex/internship) by using the <a href="https://github.com/coderplex/internship"><kbd><b>Fork</b></kbd></a> button .
+
+[![Fork Button](https://help.github.com/assets/images/help/repository/fork_button.jpg)](https://github.com/coderplex/internship)
+
+### 2. Clone it :
+
+You need to clone (download) it to local machine using
+
+```
+$ git clone https://github.com/Your_Username/internship.git 
+```
+
+> This makes a local copy of repository in your machine.
+
+Once you have cloned the `internship` repository in Github, move to that folder first using change directory command.
+
+```sh
+# This will change directory to a folder internship
+$ cd internship
+```
+
+Move to this folder for all other commands.
+
+### 3. Set it up :
+
+Run the following commands to see that *your local copy* has a reference to *your forked remote repository* in Github :
+
+```sh
+$ git remote -v
+origin  https://github.com/Your_Username/internship.git (fetch)
+origin  https://github.com/Your_Username/internship.git (push)
+```
+
+Now, lets add a reference to the original [internship](https://github.com/coderplex/internship) repository using
+
+```sh
+$ git remote add upstream https://github.com/coderplex/internship.git
+```
+
+> This adds a new remote named ***upstream***.
+
+See the changes using
+
+```sh
+$ git remote -v
+origin    https://github.com/Your_Username/internship.git (fetch)
+origin    https://github.com/Your_Username/internship.git (push)
+upstream  https://github.com/coderplex/internship.git (fetch)
+upstream  https://github.com/coderplex/internship.git (push)
+```
+
+### 4. Sync it :
+
+Always keep your local copy of repository updated with the original repository.
+Before making any changes and/or in an appropriate interval, run the following commands *carefully* to update your local repository.
+
+```sh
+# Fetch all remote repositories and delete any deleted remote branches
+$ git fetch --all --prune
+
+# Switch to `master` branch
+$ git checkout master
+
+# Reset local `master` branch to match `upstream` repository's `master` branch
+$ git reset --hard upstream/master
+
+# Push changes to your forked `internship` repo
+$ git push origin master
+```
+
+Once you have completed these steps, you are ready to start contributing by checking our `Help Wanted` Issues and creating [pull requests](https://github.com/coderplex/internship/pulls) .
+
+### 5. Create a new branch :
+
+Whenever you are going to make contribution. Please create seperate branch using command and keep your `master` branch clean (i.e. synced with remote branch).
+
+```sh
+# It will create a new branch with name Branch_Name and switch to branch Folder_Name
+$ git checkout -b Folder_Name
+```
+
+Create a seperate branch for contibution and try to use same name of branch as of folder.
+
+To switch to a desired branch
+
+```sh
+# To switch from one folder to other
+$ git checkout Folder_Name
+```
+
+To add the changes to the branch, use
+
+```sh
+# To add all files to branch Folder_Name
+$ git add .
+```
+
+Type in a message relevant for the code reveiwer using
+
+```sh
+# This message gets associated with all files you have changed
+$ git commit -m 'relevant message'
+```
+
+Now, Push your awesome work to your remote repository using
+
+```sh
+# To push your work to your remote repository
+$ git push -u origin Folder_Name
+```
+
+Finally, go to your repository in browser and click on `compare and pull requests`.
+Then add a title and description to your pull request that explains your efforts.
+
+## To contribute to the [Learnplex Project](https://github.com/coderplex/learnplex) , please refer to the Prerequisites and Installation section of [Learnplex Docs](https://docs.coderplex.in/) .