fix: Dockerfile.fast now self-contained (no base image dependency)

Inline PHP extension installation so it works without pre-pushing
the base image to the registry. Still faster than multi-stage
Dockerfile because composer+frontend are built in parallel CI steps.

Future optimization: Run ./docker/base/build-and-push.sh from a
server with registry access, then switch FROM back to hub-base:latest

Dockerfile.fast

@@ -1,10 +1,61 @@
 # ============================================
 # Fast Production Dockerfile
-# Uses pre-built base image - build time ~2-3 min vs 15-20 min
+# Single-stage build using CI pre-built assets
+# Saves time by skipping multi-stage node/composer builders
+# ============================================
+#
+# This Dockerfile expects:
+#   - vendor/ already populated (from CI composer-install step)
+#   - public/build/ already populated (from CI build-frontend step)
+#
+# Build time: ~5-7 min (vs 15-20 min with multi-stage Dockerfile)
 # ============================================
 
-# Use pre-built base with all PHP extensions
-FROM 10.100.9.70:5000/cannabrands/hub-base:latest
+FROM 10.100.9.70:5000/library/php:8.3-fpm-alpine
+
+LABEL maintainer="CannaBrands Team"
+
+# Install system dependencies
+RUN apk add --no-cache \
+    nginx \
+    supervisor \
+    postgresql-dev \
+    libpng-dev \
+    libjpeg-turbo-dev \
+    freetype-dev \
+    libzip-dev \
+    icu-dev \
+    icu-data-full \
+    zip \
+    unzip \
+    git \
+    curl \
+    bash
+
+# Install build dependencies for PHP extensions
+RUN apk add --no-cache --virtual .build-deps \
+    autoconf \
+    g++ \
+    make
+
+# Install PHP extensions
+RUN docker-php-ext-configure gd --with-freetype --with-jpeg \
+    && docker-php-ext-install -j$(nproc) \
+        pdo_pgsql \
+        pgsql \
+        gd \
+        zip \
+        intl \
+        pcntl \
+        bcmath \
+        opcache
+
+# Install Redis extension
+RUN pecl install redis \
+    && docker-php-ext-enable redis \
+    && apk del .build-deps
+
+WORKDIR /var/www/html
 
 ARG GIT_COMMIT_SHA=unknown
 ARG APP_VERSION=dev