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

    # SPA fallback.
    location / {
        try_files $uri $uri/ /index.html;
    }

    # Proxy API + auth calls to the backend container.
    location /api/ {
        proxy_pass http://api:8080;
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header Cookie $http_cookie;
    }
}