home page auth buttons implemented

[MadhusreeBera]

Description:

The login buttons of Bitbucket and Gitlab in home page is implemented

Fixes #25

Type of change:

• [x] Bug fix (non-breaking change which fixes an issue)

Checklist:

• [x] My code follows the style guidelines of this project.
• [x] I have performed a self-review of my own code.
• [x] My changes generate no new warnings.
• [x] Any dependent changes have been merged and published in downstream modules.

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