server {
	listen 80;
	server_name _;
	root /usr/share/nginx/html;

	gzip on;
	gzip_types text/css application/javascript application/json application/manifest+json image/svg+xml;

	# Hashed build output never changes.
	location /_app/immutable/ {
		add_header Cache-Control "public, max-age=31536000, immutable";
		try_files $uri =404;
	}

	# The service worker and app shell must be re-checked so updates reach clients.
	location = /service-worker.js {
		add_header Cache-Control "no-cache";
		try_files $uri =404;
	}

	# nginx's default MIME table has no entry for the PWA manifest.
	location ~ \.webmanifest$ {
		types { }
		default_type application/manifest+json;
		add_header Cache-Control "no-cache";
	}

	# Client-side app: unknown paths fall back to the SPA shell.
	location / {
		add_header Cache-Control "no-cache";
		try_files $uri $uri/ /index.html;
	}
}