server { listen 80; server_name localhost; root /usr/share/nginx/html; index index.html index.htm; location / { try_files $uri $uri/ /index.html; } location /custom-auth { proxy_pass http://localhost:8000; proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection 'upgrade'; proxy_set_header Host $host; proxy_cache_bypass $http_upgrade; } }