server {
    listen 80;
    server_name _;
    root /usr/share/nginx/html;
    index index.html;
    # Keep in sync with SPIPE_MAX_UPLOAD_MB (backend); nginx rejects larger
    # bodies before they reach the API.
    client_max_body_size 21m;
    gzip on;
    gzip_types application/json text/plain application/javascript text/css;
    gzip_min_length 1024;
    # DEM rasters (SPIPE_MAX_DEM_MB, default 300).
    location /api/dem {
        client_max_body_size 301m;
        proxy_request_buffering off;
        proxy_pass http://api:8000;
        proxy_read_timeout 600s;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
    }
    location /api/ {
        proxy_pass http://api:8000;
        proxy_read_timeout 300s;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
    }
    location / {
        try_files $uri $uri/ /index.html;
    }
}