server { listen 8080; server_name _; root /usr/share/nginx/html; index index.html; location = /health { default_type application/json; return 200 '{"ok":true}'; } location = /config.js { add_header Cache-Control "no-store, no-cache, must-revalidate" always; try_files $uri =404; } location / { try_files $uri $uri/ /index.html; } }