Update Dockerfile

Dockerfile

@@ -20,7 +20,7 @@ RUN pip install --no-cache-dir -r requirements.txt
 RUN mkdir -p /home/searxng/searxng/searx
 
 # Generate a secure secret key and save it to settings.yml
-RUN python3 -c 'import secrets, os; os.makedirs("/home/searxng/searxng/searx", exist_ok=True); open("/home/searxng/searxng/searx/settings.yml", "w").write("server:\n  secret_key: \\"" + secrets.token_hex(32) + "\\"\n")'
+RUN python3 -c 'import secrets, os; os.makedirs("/home/searxng/searxng/searx", exist_ok=True); open("/home/searxng/searxng/searx/settings.yml", "w").write(f"server:\n  secret_key: \"{secrets.token_hex(32)}\"\n")'
 
 # Expose port 7860 (required for Hugging Face)
 EXPOSE 7860