Add Github OAuth feature to backend application

[tiokim]

Description

It is intended to login with Github or Github Enterprise account.

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

1. Creating an OAuth app from Github is required. see the official doc.
2. Place the necessary values to the properties, client-id and client-secret, in docker-compose.yml file.
3. Build with docker compose build and run the lpvs container with docker compose up
4. Go to http://localhost:7896/login on the web browser and choose Github.

Test Configuration:

• Java: v11
• LPVS Release: v1.x.x

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[m-rudyk]

I have no objection, approved.

[o-kopysov]

LGTM