nginx.conf

server {
    listen 80;
    server_name _;
    root /usr/share/nginx/html;
    index index.html;
    # Preserve the public scheme and port when served behind a proxy or Docker.
    absolute_redirect off;

    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_comp_level 6;
    gzip_proxied any;
    gzip_types text/plain text/css text/javascript application/javascript application/json
               application/xml application/rss+xml image/svg+xml font/ttf font/otf;

    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;

    location = /docs { return 308 /docs/; }
    location /docs/ {
        try_files $uri $uri.html $uri/ =404;
        error_page 404 /docs/404.html;
    }
    location / {
        try_files $uri $uri/ =404;
        error_page 404 /404.html;
    }
}