Add OG preview and fix curl pipe execution

.github/workflows/deploy.yml

@@ -29,7 +29,7 @@ jobs:
       - name: Prepare site files
         run: |
           mkdir -p _site
-          cp index.html install.sh _site/
+          cp index.html install.sh og-image.png _site/
           cp -f favicon.ico .nojekyll _site/ 2>/dev/null || true
 
       - name: Upload artifact

index.html

@@ -5,6 +5,22 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>Klever Developer Tools — Install</title>
     <meta name="description" content="Install the complete Klever smart contract development environment with a single command.">
+
+    <!-- Open Graph / Social Media -->
+    <meta property="og:type" content="website">
+    <meta property="og:url" content="https://install.klever.org/">
+    <meta property="og:title" content="Klever Developer Tools">
+    <meta property="og:description" content="Everything you need to build, test, and deploy smart contracts on the Klever blockchain. One command, fully configured.">
+    <meta property="og:image" content="https://install.klever.org/og-image.png">
+    <meta property="og:image:width" content="1200">
+    <meta property="og:image:height" content="630">
+
+    <!-- Twitter Card -->
+    <meta name="twitter:card" content="summary_large_image">
+    <meta name="twitter:title" content="Klever Developer Tools">
+    <meta name="twitter:description" content="Everything you need to build, test, and deploy smart contracts on the Klever blockchain. One command, fully configured.">
+    <meta name="twitter:image" content="https://install.klever.org/og-image.png">
+
     <link rel="icon" type="image/x-icon" href="/favicon.ico">
     <style>
         *, *::before, *::after {

install.sh

@@ -880,8 +880,8 @@ main() {
     fi
 }
 
-# Ensure entire script is downloaded before execution when piped via curl | bash
-# Guard allows sourcing functions without running main (e.g., for testing)
-if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
+# Guard allows sourcing functions without running main (e.g., for testing).
+# When piped via curl | bash, BASH_SOURCE[0] is empty — run main in that case too.
+if [[ -z "${BASH_SOURCE[0]}" || "${BASH_SOURCE[0]}" == "${0}" ]]; then
     main "$@"
 fi