SEO: og:image/twitter:image, site_name, locale, hreflang und JSON-LD (WebApplication); Route fuer screenshot.png

app.py

@@ -284,6 +284,12 @@ def service_worker():
 	# Service Worker muss auf Top-Level liegen
 	log_page_view("service_worker", request.headers.get('User-Agent'))
 	return send_from_directory(Path(__file__).parent / 'static', 'sw.js', mimetype='application/javascript')
+@app.route('/screenshot.png')
+def screenshot_image():
+    """Liefert das OpenGraph/Twitter Vorschaubild aus dem Projektstamm."""
+    log_page_view("screenshot", request.headers.get('User-Agent'))
+    return send_from_directory(Path(__file__).parent, 'screenshot.png', mimetype='image/png')
+
 
 
 @app.route('/login', methods=['GET', 'POST'])