Enhance deployment workflow by saving Docker image as a tarball and uploading it as an artifact. Update AdminPage to provide user feedback for unsupported Docker export functionality.

src/app/admin/page.tsx

@@ -584,11 +584,31 @@ export default function AdminPage() {
                 </div>
               )}
               <button
-                onClick={handleExportTarball}
+                onClick={() => {
+                  if (isDocker) {
+                    // Custom popup for Docker support message
+                    const dockerSupportPopup = document.createElement('div');
+                    dockerSupportPopup.innerHTML = 'Exporting from Docker is not supported yet.';
+                    dockerSupportPopup.style.position = 'fixed';
+                    dockerSupportPopup.style.top = '50%';
+                    dockerSupportPopup.style.left = '50%';
+                    dockerSupportPopup.style.transform = 'translate(-50%, -50%)';
+                    dockerSupportPopup.style.backgroundColor = 'white';
+                    dockerSupportPopup.style.padding = '20px';
+                    dockerSupportPopup.style.borderRadius = '5px';
+                    dockerSupportPopup.style.boxShadow = '0 4px 8px rgba(0, 0, 0, 0.2)';
+                    dockerSupportPopup.style.zIndex = '1000';
+                    document.body.appendChild(dockerSupportPopup);
+                    setTimeout(() => {
+                      document.body.removeChild(dockerSupportPopup);
+                    }, 3000);
+                  } else {
+                    handleExportTarball();
+                  }
+                }}
                 className="px-4 py-2 bg-green-600 text-white rounded hover:bg-green-700"
-                title="Export the entire root folder as a tarball"
               >
-                Export Root as Tarball
+                Export Posts
               </button>
             </div>
           </div>