Replace push with merge request in contributor docs

Signed-off-by: Sachin S. Kamath <sskamath96@gmail.com>

CONTRIBUTING.md

 ### Contributing to this repo
 
 * Fork the repository
-* Clone your fork using `https://git.amrita.edu/<your_username>/hodor-webapp`
+* Clone your fork using `https://git.amrita.edu/<your_username>/hodor-backend`
 * Make a new branch with your changes using `git branch -b <branch_name>`. For
  instance, if you are working on adding tests, you should do something like `git branch -b add_tests`.
-* Send in a pull-request.
-* Once you're done with the changes follow the commands to push to origin repo:
-  `git add <filename>`
-  `git commit -m "<Comment on changes made>"`
-  `git push origin <branch_name>`
+* Make your desired changes.
+* Stage changes to git using `git add <filenames>`
+* Commit your changes using `git commit -m "<A brief summary of your work>"`
+* Push to your fork and the new branch you created like : `git push <url_of_fork> <branch_name>`
+* Go to GitLab and send a merge-request!
 
-
-More instructions coming soon :)