[TEAMMATES#11736] Update links to point to the deployed site for deve…

…loper guide (TEAMMATES#11740)

.github/PULL_REQUEST_TEMPLATE.md

@@ -5,7 +5,7 @@ Fixes #
 <!-- Remove this portion after you have made the checks. -->
 
 Ensure that you have:
-- [ ] Read and understood our PR guideline: https://github.com/TEAMMATES/teammates/blob/master/docs/process.md#step-4-submit-a-pr
+- [ ] Read and understood our PR guideline: https://teammates.github.io/teammates/process.html#step-4-submit-a-pr
   - [ ] Added the issue number to the "Fixes" keyword above
   - [ ] Titled the PR as specified in the abovementioned document
 - [ ] Made your changes on a branch other than `master` and `release`

README.md

@@ -12,14 +12,14 @@ It is provided as a cloud-based service for educators/students and is currently
 
 This is the developer web site for TEAMMATES. **Click [here](http://teammatesv4.appspot.com/) to go to the TEAMMATES product website.**
 
-[**Documentation for Developers** :book:](docs/README.md) |
+[**Documentation for Developers** :book:](https://teammates.github.io/teammates) |
 [Version History](https://github.com/TEAMMATES/teammates/milestones?direction=desc&sort=due_date&state=closed) |
 [Project Stats](https://www.openhub.net/p/teammatesonline)
 
 ## Interested to join TEAMMATES developer team?
 
 We welcome contributions from developers, especially students. Here are some resources:
-* [**Contributor Orientation Guide**](docs/CONTRIBUTING.md): This document describes what you need to know/do to become a contributor.
+* [**Contributor Orientation Guide**](https://teammates.github.io/teammates/contributing-doc.html): This document describes what you need to know/do to become a contributor.
 * [**Project ideas page**](https://github.com/TEAMMATES/teammates/wiki): These are for those who would like to do a relatively bigger projects with TEAMMATES (e.g. summer internships).
 
 ## Acknowledgements