worker_processes auto;
pid /tmp/nginx.pid;
error_log /dev/stderr warn;
events { worker_connections 1024; }
http {
    include /etc/nginx/mime.types;
    default_type application/octet-stream;
    # Do not log query strings, cookies, authorization or bodies.
    log_format safe '$request_method $uri $status';
    access_log /dev/stdout safe;
    client_body_temp_path /tmp/client_temp;
    proxy_temp_path /tmp/proxy_temp;
    fastcgi_temp_path /tmp/fastcgi_temp;
    uwsgi_temp_path /tmp/uwsgi_temp;
    scgi_temp_path /tmp/scgi_temp;
    map $http_x_forwarded_proto $forwarded_proto {
        default $http_x_forwarded_proto;
        '' $scheme;
    }
    # One shared budget: the external proxy's client-IP forwarding is not verified.
    map "$request_method:$uri" $auth_admission_key {
        default "";
        POST:/api/v1/auth/login auth;
        POST:/api/v1/auth/register auth;
    }
    limit_req_zone $auth_admission_key zone=auth_admission:1m rate=2r/s;
    limit_req_status 429;
    server {
        listen 8080;
        server_name _;
        root /usr/share/nginx/html;
        resolver 127.0.0.11 valid=5s ipv6=off;
        location /api/ {
            limit_req zone=auth_admission burst=5 nodelay;
            set $backend http://backend:3000;
            proxy_pass $backend$request_uri;
            proxy_set_header Host $http_host;
            proxy_set_header X-Forwarded-Host $http_host;
            proxy_set_header X-Forwarded-Proto $forwarded_proto;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Request-ID $http_x_request_id;
        }
        location /assets/ {
            try_files $uri =404;
            add_header Cache-Control "public, max-age=31536000, immutable";
        }
        location / {
            try_files $uri $uri/ /index.html;
            add_header Cache-Control "no-cache" always;
        }
    }
}