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

    location /api/ {
        proxy_pass http://backend:3000/;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }

    location / {
        try_files $uri $uri/ /index.html;
    }

    # Always revalidate the HTML shell so it never points at a stale, no-longer-existing
    # hashed JS/CSS bundle after a new deploy.
    location = /index.html {
        add_header Cache-Control "no-cache";
    }

    location ~* \.(?:js|css|png|jpg|jpeg|svg|woff2?)$ {
        expires 7d;
        add_header Cache-Control "public";
    }

    # Never cache the service worker or manifest so updates roll out immediately
    location = /sw.js {
        add_header Cache-Control "no-cache";
    }
    location = /manifest.webmanifest {
        default_type application/manifest+json;
        add_header Cache-Control "no-cache";
    }
}