Add OG preview and fix curl pipe execution

[fbsobreira]

Summary

• Fix curl | bash execution — BASH_SOURCE[0] is empty when piped, so the guard now also checks for empty to run main
• Add Open Graph and Twitter Card meta tags for social media previews
• Generate 1200x630 branded preview image (og-image.png)
• Include og-image.png in GitHub Pages deploy workflow

Test plan

• Verify curl -fsSL https://install.klever.org/install.sh | bash runs the installer
• Verify source ./install.sh does NOT run main (sourcing guard still works)
• Share install.klever.org link on Slack/Twitter and confirm preview renders

Summary by CodeRabbit

• New Features

  • Enhanced social media sharing with Open Graph and Twitter Card metadata for richer content previews when links are shared
  • Installation script now supports execution via piped curl command for improved accessibility

• Chores

  • Updated deployment workflow to include additional assets in the build process

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

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📝 Walkthrough

Walkthrough

The PR adds social media preview capabilities to the homepage with Open Graph and Twitter Card meta tags, includes copying an og-image asset during deployment, and updates the install script to support execution via piped curl commands in addition to direct script invocation.

Changes

Cohort / File(s)	Summary
Social Media Preview Support .github/workflows/deploy.yml, index.html	Deploy workflow now copies og-image.png alongside HTML files; index.html adds 16 lines of Open Graph and Twitter Card meta tags for social sharing previews.
Script Execution Enhancement install.sh	Guard condition expanded to support piped execution (curl | bash) by checking if BASH_SOURCE[0] is empty or direct execution ($0), with comments updated accordingly.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

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[Copilot]

Pull request overview

This pull request fixes the curl | bash execution issue and adds social media preview functionality to the Klever installer landing page. The bash sourcing guard now correctly detects when the script is piped to bash (where BASH_SOURCE[0] is empty) and executes the main function in that scenario, while still preventing execution when the script is sourced for testing.

Changes:

• Fixed bash execution guard to handle empty BASH_SOURCE[0] when piped via curl
• Added Open Graph and Twitter Card meta tags for rich social media previews
• Included og-image.png in the GitHub Pages deployment workflow

Reviewed changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated no comments.

File	Description
install.sh	Updated bash guard to check for empty BASH_SOURCE[0] to support curl pipe execution
index.html	Added Open Graph and Twitter Card meta tags with proper image dimensions (1200x630)
.github/workflows/deploy.yml	Included og-image.png in the site files copied during deployment
og-image.png	Added 1200x630 branded preview image for social media sharing

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