Added docker environment emulating a manual installed Part-DB on debian

Used to debug issues like #1423

.docker/debian-manual-guide/Dockerfile

@@ -0,0 +1,61 @@
+# Reproduces https://docs.part-db.de/installation/installation_guide-debian.html
+# on Debian 12 (bookworm) as closely as possible, for debugging issues reported
+# by users who followed that guide (Apache2 + mod_php, not the project's own
+# FrankenPHP-based Dockerfile at the repo root).
+FROM debian:12
+
+ARG HOST_UID=1000
+ARG HOST_GID=1000
+
+ENV DEBIAN_FRONTEND=noninteractive
+
+# --- Prerequisites (guide: "Prerequisites Installation") ---
+RUN apt-get update && apt-get upgrade -y && \
+    apt-get install -y --no-install-recommends \
+        git curl zip ca-certificates software-properties-common \
+        apt-transport-https lsb-release nano wget sqlite3 gnupg openssl \
+    && rm -rf /var/lib/apt/lists/*
+
+# --- PHP and Apache2 (guide: "PHP and Apache2 Setup") ---
+# Debian 12 ships PHP 8.2 by default, so no extra PHP repo is needed.
+RUN apt-get update && apt-get install -y --no-install-recommends \
+        apache2 php8.2 libapache2-mod-php8.2 \
+        php8.2-opcache php8.2-curl php8.2-gd php8.2-mbstring \
+        php8.2-xml php8.2-bcmath php8.2-intl php8.2-zip php8.2-xsl \
+        php8.2-sqlite3 php8.2-mysql \
+    && rm -rf /var/lib/apt/lists/*
+
+# --- Composer (guide: "Composer Installation") ---
+RUN wget -O /tmp/composer-setup.php https://getcomposer.org/installer \
+    && php /tmp/composer-setup.php --install-dir=/usr/local/bin --filename=composer \
+    && chmod +x /usr/local/bin/composer \
+    && rm /tmp/composer-setup.php
+
+# --- Node.js and Yarn (guide: "Node.js and Yarn Setup") ---
+RUN curl -fsSL https://deb.nodesource.com/setup_22.x | bash - \
+    && apt-get install -y --no-install-recommends nodejs \
+    && curl -sL https://dl.yarnpkg.com/debian/pubkey.gpg | gpg --dearmor -o /usr/share/keyrings/yarnkey.gpg \
+    && echo "deb [signed-by=/usr/share/keyrings/yarnkey.gpg] https://dl.yarnpkg.com/debian stable main" > /etc/apt/sources.list.d/yarn.list \
+    && apt-get update && apt-get install -y --no-install-recommends yarn \
+    && rm -rf /var/lib/apt/lists/*
+
+# Map www-data to the host user's uid/gid so files created inside the
+# bind-mounted repo (composer/yarn artifacts, chown'd dirs) don't end up
+# owned by a foreign uid on the host.
+RUN groupmod -g ${HOST_GID} www-data && usermod -u ${HOST_UID} -g ${HOST_GID} www-data \
+    && mkdir -p /var/www/partdb && chown -R www-data:www-data /var/www
+
+# --- Apache2 Configuration (guide: "Apache2 Configuration") ---
+COPY partdb.conf /etc/apache2/sites-available/partdb.conf
+RUN ln -sf /etc/apache2/sites-available/partdb.conf /etc/apache2/sites-enabled/partdb.conf \
+    && a2enmod rewrite headers access_compat \
+    && rm -f /etc/apache2/sites-enabled/000-default.conf
+
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+
+WORKDIR /var/www/partdb
+EXPOSE 80
+
+ENTRYPOINT ["/entrypoint.sh"]
+CMD ["apache2ctl", "-D", "FOREGROUND"]