diff --git a/build/Dockerfile b/build/Dockerfile
index d78669e..3bfc359 100644
--- a/build/Dockerfile
+++ b/build/Dockerfile
@@ -1,44 +1,145 @@
-FROM php:8.4-fpm-alpine
+# =============================================================================
+# Stage 1: Build
+# Installs all PHP + Node dependencies and builds Vite assets.
+# This stage is NOT used in production — only its outputs are copied.
+# =============================================================================
+FROM php:8.4-cli-bookworm AS build
 
-RUN apk add --no-cache \
-    curl \
-    git \
-    zip \
-    unzip \
-    libzip-dev \
-    imagemagick \
-    libreoffice \
-    libreoffice-lang-de \
-    ghostscript \
-    poppler-utils \
-    sqlite \
-    sqlite-dev \
-    postgresql-client \
-    mysql-client \
-    nodejs \
-    npm \
-    fcgi
+# System deps for build stage
+RUN apt-get update && apt-get install -y --no-install-recommends \
+        git \
+        unzip \
+        zip \
+        curl \
+        libzip-dev \
+        libfreetype6-dev \
+        libjpeg62-turbo-dev \
+        libpng-dev \
+    && rm -rf /var/lib/apt/lists/*
 
-RUN docker-php-ext-install \
-    pdo_sqlite \
-    pdo_mysql \
-    zip \
-    bcmath
+# PHP extensions needed for composer install / post-autoload-dump
+RUN docker-php-ext-configure gd --with-freetype --with-jpeg \
+    && docker-php-ext-install gd zip
 
-COPY --from=composer:latest /usr/bin/composer /usr/bin/composer
+# Install Node.js 20 LTS via NodeSource
+RUN curl -fsSL https://deb.nodesource.com/setup_20.x | bash - \
+    && apt-get install -y --no-install-recommends nodejs \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install Composer
+COPY --from=composer:2 /usr/bin/composer /usr/bin/composer
 
 WORKDIR /app
 
-COPY build/fpm-healthcheck.conf /usr/local/etc/php-fpm.d/zz-healthcheck.conf
-COPY build/php-error-logging.conf /usr/local/etc/php-fpm.d/zz-error-logging.conf
-COPY build/php-errors.ini /usr/local/etc/php/conf.d/errors.ini
-COPY build/entrypoint.sh /usr/local/bin/entrypoint.sh
-RUN chmod +x /usr/local/bin/entrypoint.sh
+# ── PHP dependency layer (cached until composer.lock changes) ────────────────
+COPY composer.json composer.lock ./
+RUN composer install \
+        --no-dev \
+        --optimize-autoloader \
+        --no-scripts \
+        --no-interaction \
+        --prefer-dist
 
+# ── Node dependency layer (cached until package-lock.json changes) ───────────
+COPY package.json package-lock.json ./
+RUN npm ci --ignore-scripts
+
+# ── Full source + build ──────────────────────────────────────────────────────
+COPY . .
+
+# Run composer post-autoload-dump scripts (package discovery etc.)
+RUN composer run-script post-autoload-dump --no-interaction || true
+
+# Build Vite assets (outputs to public/build/)
+RUN npm run build
+
+# Copy public/ → public-build/ so the production stage retains built assets
+# even after public/ becomes a runtime bind-mount target.
+RUN cp -r public/ public-build/
+
+
+# =============================================================================
+# Stage 2: Production
+# PHP-FPM runtime image with all system dependencies.
+# Node.js is NOT present here.
+# =============================================================================
+FROM php:8.4-fpm-bookworm AS production
+
+# System packages (excluding Node.js — not needed at runtime)
+RUN apt-get update && apt-get install -y --no-install-recommends \
+        supervisor \
+        libzip-dev \
+        libfreetype6-dev \
+        libjpeg62-turbo-dev \
+        libpng-dev \
+        libsqlite3-dev \
+        default-mysql-client \
+        ghostscript \
+        poppler-utils \
+        sqlite3 \
+        libfcgi-bin \
+        unzip \
+        zip \
+        curl \
+        git \
+    && rm -rf /var/lib/apt/lists/*
+
+# LibreOffice for PowerPoint → PDF conversion (large layer, separate cache)
+RUN apt-get update && apt-get install -y --no-install-recommends \
+        libreoffice-impress \
+        libreoffice-l10n-de \
+    && rm -rf /var/lib/apt/lists/*
+
+# PHP extensions
+RUN docker-php-ext-configure gd --with-freetype --with-jpeg \
+    && docker-php-ext-install \
+        gd \
+        pdo_sqlite \
+        pdo_mysql \
+        zip \
+        bcmath
+
+# Install Composer (needed for artisan commands, not for installing packages)
+COPY --from=composer:2 /usr/bin/composer /usr/bin/composer
+
+WORKDIR /app
+
+# ── Copy built application from build stage ──────────────────────────────────
+COPY --from=build /app /app
+
+# Remove node_modules — not needed at runtime
+RUN rm -rf /app/node_modules
+
+# ── Install Docker config files ──────────────────────────────────────────────
+# Supervisord (manages php-fpm, queue:work, schedule:work)
+COPY build/supervisord.conf /etc/supervisor/conf.d/supervisord.conf
+
+# PHP runtime config (upload limits, error logging, timezone)
+COPY build/php.ini /usr/local/etc/php/conf.d/zz-app.ini
+
+# FPM pool config (replaces default www pool — sets ping endpoint, clear_env=no)
+COPY build/fpm-pool.conf /usr/local/etc/php-fpm.d/zz-www.conf
+
+# FPM error logging to stderr
+COPY build/fpm-error-logging.conf /usr/local/etc/php-fpm.d/zz-error-logging.conf
+
+# Remove default FPM pool config (replaced by our zz-www.conf above)
+RUN rm -f /usr/local/etc/php-fpm.d/www.conf /usr/local/etc/php-fpm.d/www.conf.default
+
+# ── Boot / Init scripts ───────────────────────────────────────────────────────
+RUN chmod +x /app/build/boot-container.sh /app/build/init-app.sh
+
+# ── Runtime setup ─────────────────────────────────────────────────────────────
 EXPOSE 9000
 
-HEALTHCHECK --interval=30s --timeout=10s --start-period=30s --retries=3 \
-    CMD SCRIPT_NAME=/ping SCRIPT_FILENAME=/ping REQUEST_METHOD=GET cgi-fcgi -bind -connect 127.0.0.1:9000 | grep -q pong || exit 1
+# Healthcheck: FPM ping endpoint (starts checking after 60s to allow boot)
+HEALTHCHECK --interval=30s --timeout=10s --start-period=60s --retries=3 \
+    CMD SCRIPT_NAME=/ping SCRIPT_FILENAME=/ping REQUEST_METHOD=GET \
+        cgi-fcgi -bind -connect 127.0.0.1:9000 2>/dev/null | grep -q "pong" || exit 1
 
-ENTRYPOINT ["entrypoint.sh"]
-CMD ["php-fpm"]
+# boot-container.sh runs as root: creates dirs, sets permissions,
+# creates DB on first run, runs migrations, runs cache commands,
+# syncs built assets to the bind-mounted public/ directory,
+# then exec's supervisord (CMD).
+ENTRYPOINT ["/app/build/boot-container.sh"]
+CMD ["/usr/bin/supervisord", "-n", "-c", "/etc/supervisor/conf.d/supervisord.conf"]