Harden web root, secrets and realtime auth

- .htaccess: refuse .git, .env, docker, nodejs, sdlc*, scripts, archives and
  app internals; security headers, HSTS over TLS, optional HTTPS redirect
- uploads served through app/file.php to signed-in users only
- Apache/PHP hardening config for the container (ServerTokens, expose_php)
- least-privilege DB account and APP_SECRET_KEY via docker/php/provision.php;
  SMTP passwords re-encrypted with a random IV (secret_box.php)
- Socket.IO rooms from a PHP-signed token; /emit and cron refuse empty secrets
- escape notification text; CLI guards on build scripts; no fixed demo password

docker/php/Dockerfile

@@ -5,12 +5,16 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
         libpng-dev libjpeg-dev libfreetype6-dev \
     && docker-php-ext-configure gd --with-jpeg --with-freetype \
     && docker-php-ext-install pdo_mysql mysqli mbstring gd zip intl sockets exif opcache \
-    && a2enmod rewrite \
+    && a2enmod rewrite headers \
     && apt-get clean && rm -rf /var/lib/apt/lists/*
 
 COPY docker/php/opcache.ini /usr/local/etc/php/conf.d/opcache-recommended.ini
+COPY docker/php/security.ini /usr/local/etc/php/conf.d/zz-security.ini
+COPY docker/php/apache-wms.conf /etc/apache2/conf-available/wms.conf
+RUN a2enconf wms
 COPY docker/php/entrypoint.sh /usr/local/bin/docker-entrypoint-wms.sh
 COPY docker/php/config.php.template /usr/local/etc/wms/config.php.template
+COPY docker/php/provision.php /usr/local/etc/wms/provision.php
 RUN chmod +x /usr/local/bin/docker-entrypoint-wms.sh
 
 WORKDIR /var/www/html/wms-app