server {
    listen 80;
    server_name _;

    root /usr/share/nginx/html;
    index index.html;

    location /api/ {
        proxy_pass http://172.17.0.1:8512;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        # Allow image uploads (barcode/receipt photos from phone cameras).
        client_max_body_size 20m;
    }

    location = /index.html {
        add_header Cache-Control "no-cache, no-store, must-revalidate";
        try_files $uri /index.html;
    }

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

    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff2?)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }
}