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

    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_types
        text/plain
        text/css
        text/javascript
        text/xml
        application/json
        application/javascript
        application/xml+rss
        application/atom+xml
        image/svg+xml;

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

    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
        expires 30d;
        add_header Cache-Control "public, immutable";
    }

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

    location = /health {
        access_log off;
        return 200 "ok\n";
        add_header Content-Type text/plain;
    }

    error_page 500 502 503 504 /50x.html;
    location = /50x.html {
        root /usr/share/nginx/html;
    }
}