Configure OAuth Providers (Google and GitHub) [93-2]

[mehalyna]

• Task: Add OAuth provider credentials (Client ID, Secret) to environment variables.
• Steps:
  1. Create OAuth clients on Google Console and GitHub Developer Portal.
  2. Store the credentials:

     GOOGLE_CLIENT_ID=<your-client-id>
     GOOGLE_CLIENT_SECRET=<your-client-secret>
     GITHUB_CLIENT_ID=<your-client-id>
     GITHUB_CLIENT_SECRET=<your-client-secret>

  3. Configure these in settings.py.
• Deliverable: OAuth credentials configured and connected.

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US #93

[Chelakhovl]