map $http_upgrade $sw2_connection_upgrade {
    default upgrade;
    '' close;
}

map $http_x_forwarded_proto $sw2_forwarded_proto {
    default $scheme;
    http http;
    https https;
}

server {
    listen 80;
    server_name _;
    root /usr/share/nginx/html;
    index index.html;
    server_tokens off;
    client_max_body_size 1024m;

    location = /healthz {
        access_log off;
        default_type text/plain;
        return 200 'ok';
    }

    location = /api {
        return 308 /api/;
    }

    location ^~ /api/ {
        proxy_pass http://sw2-backend:8000/;
        proxy_http_version 1.1;
        proxy_set_header Host $http_host;
        proxy_set_header X-Real-IP $http_x_real_ip;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $sw2_forwarded_proto;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $sw2_connection_upgrade;
        proxy_buffering off;
        proxy_request_buffering off;
        proxy_read_timeout 600s;
        proxy_send_timeout 600s;
    }

    location ~ /\. {
        return 404;
    }

    location / {
        add_header Cache-Control 'no-cache';
        try_files $uri $uri/ /index.html;
    }
}