Add Docker setup for PHP application

- Created a Dockerfile to set up a PHP 8.3 environment with Apache.
- Configured document root and timezone settings.
- Installed Composer and necessary PHP extensions.
- Added custom entrypoint and foreground scripts for Apache.
- Set up environment variable handling in the entrypoint script.
- Included commands for cache clearing and warming during startup.

Dockerfile

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+FROM php:8.3-apache AS runtime
+
+ENV APACHE_DOCUMENT_ROOT=/var/www/website/public/
+ENV WEBSITE_ROOT=/var/www/website/
+ENV TZ=Europe/Brussels
+ENV COMPOSER_ALLOW_SUPERUSER=1
+ENV DEBIAN_FRONTEND=noninteractive
+
+COPY . ${APACHE_DOCUMENT_ROOT}
+
+RUN sed -ri -e "s!/var/www/html!${APACHE_DOCUMENT_ROOT}!g" /etc/apache2/sites-available/*.conf
+RUN sed -ri -e "s!/var/www/!${APACHE_DOCUMENT_ROOT}!g" /etc/apache2/apache2.conf /etc/apache2/conf-available/*.conf
+RUN a2enmod rewrite
+
+RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer
+ADD https://github.com/mlocati/docker-php-extension-installer/releases/latest/download/install-php-extensions /usr/local/bin
+RUN set -eux; \
+    chmod uga+x /usr/local/bin/install-php-extensions && sync
+
+RUN set -eux;install-php-extensions intl zip
+
+RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
+RUN mv "$PHP_INI_DIR/php.ini-production" "$PHP_INI_DIR/php.ini"
+RUN printf "[PHP]\ndate.timezone = \"$TZ\"\n" > /usr/local/etc/php/conf.d/tzone.ini
+
+COPY docker-resources/apache2-foreground          /usr/local/bin/apache2-foreground
+COPY docker-resources/entrypoint.sh               /usr/local/bin/entrypoint.sh
+
+RUN set -eux; \
+    chmod uga+x /usr/local/bin/entrypoint.sh && \
+    chmod uga+x /usr/local/bin/apache2-foreground && sync
+
+USER www-data
+WORKDIR ${WEBSITE_ROOT}
+RUN mv .env.sample .env
+RUN composer install
+RUN php bin/console asset-map:compile
+
+ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]

docker-resources/apache2-foreground

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+#!/bin/bash
+set -e
+
+# Note: we don't just use "apache2ctl" here because it itself is just a shell-script wrapper around apache2 which provides extra functionality like "apache2ctl start" for launching apache2 in the background.
+# (also, when run as "apache2ctl <apache args>", it does not use "exec", which leaves an undesirable resident shell process)
+
+: "${APACHE_CONFDIR:=/etc/apache2}"
+: "${APACHE_ENVVARS:=$APACHE_CONFDIR/envvars}"
+if test -f "$APACHE_ENVVARS"; then
+	. "$APACHE_ENVVARS"
+fi
+
+# Apache gets grumpy about PID files pre-existing
+: "${APACHE_RUN_DIR:=/var/run/apache2}"
+: "${APACHE_PID_FILE:=$APACHE_RUN_DIR/apache2.pid}"
+rm -f "$APACHE_PID_FILE"
+
+# create missing directories
+# (especially APACHE_RUN_DIR, APACHE_LOCK_DIR, and APACHE_LOG_DIR)
+for e in "${!APACHE_@}"; do
+	if [[ "$e" == *_DIR ]] && [[ "${!e}" == /* ]]; then
+		# handle "/var/lock" being a symlink to "/run/lock", but "/run/lock" not existing beforehand, so "/var/lock/something" fails to mkdir
+		#   mkdir: cannot create directory '/var/lock': File exists
+		dir="${!e}"
+		while [ "$dir" != "$(dirname "$dir")" ]; do
+			dir="$(dirname "$dir")"
+			if [ -d "$dir" ]; then
+				break
+			fi
+			absDir="$(readlink -f "$dir" 2>/dev/null || :)"
+			if [ -n "$absDir" ]; then
+				mkdir -p "$absDir"
+			fi
+		done
+
+		mkdir -p "${!e}"
+	fi
+done
+
+exec apache2 -DFOREGROUND "$@"

docker-resources/entrypoint.sh

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+#!/bin/bash
+
+echo "Now in entrypoint.sh for Website"
+echo "Script:       1.0.21 (2022-02-17)"
+echo "User:         '$(whoami)'"
+echo "Group:        '$(id -g -n)'"
+echo "Working dir:  '$(pwd)'"
+
+# https://github.com/docker-library/wordpress/blob/master/docker-entrypoint.sh
+# usage: file_env VAR [DEFAULT]
+#    ie: file_env 'XYZ_DB_PASSWORD' 'example'
+# (will allow for "$XYZ_DB_PASSWORD_FILE" to fill in the value of
+#  "$XYZ_DB_PASSWORD" from a file, especially for Docker's secrets feature)
+file_env() {
+	local var="$1"
+	local fileVar="${var}_FILE"
+	local def="${2:-}"
+	if [ "${!var:-}" ] && [ "${!fileVar:-}" ]; then
+		echo >&2 "error: both $var and $fileVar are set (but are exclusive)"
+		exit 1
+	fi
+	local val="$def"
+	if [ "${!var:-}" ]; then
+		val="${!var}"
+	elif [ "${!fileVar:-}" ]; then
+		val="$(< "${!fileVar}")"
+	fi
+	export "$var"="$val"
+	unset "$fileVar"
+}
+
+# envs that can be appended with _FILE
+envs=(
+	APP_ENV
+    APP_SECRET
+    DATADIR
+    TRUSTED_PROXIES
+)
+
+echo "Now parsing _FILE variables."
+for e in "${envs[@]}"; do
+  file_env "$e"
+done
+echo "done!"
+
+
+echo "Dump envs to .env..."
+rm -rf .env
+touch .env
+for e in "${envs[@]}"; do
+  echo "$e=\"${!e}\"" >> .env
+done
+echo "Dump auto load..."
+composer dump-autoload
+
+echo "Current working dir is '$(pwd)'"
+
+
+if [[ $DKR_BUILD_LOCALE == "true" ]]; then
+  echo "Will build all locales..."
+  locale-gen
+else
+  echo "Will not build the locales..."
+fi
+
+
+echo "Current working dir is '$(pwd)'"
+
+# there are 0 upgrade commands
+if [[ $DKR_RUN_UPGRADE == "false" ]]; then
+  echo 'Will NOT run upgrade commands.'
+else
+  echo 'Running upgrade commands...'
+fi
+
+# there are 0 verify commands
+if [[ $DKR_RUN_VERIFY == "false" ]]; then
+  echo 'Will NOT run verification commands.'
+else
+  echo 'Running verification commands...'
+fi
+
+# report commands
+if [[ $DKR_RUN_REPORT == "false" ]]; then
+  echo 'Will NOT run report commands.'
+else
+  echo 'Running report commands...'
+fi
+
+# set docker var.
+export IS_DOCKER=true
+
+if [ -z $APACHE_RUN_USER ]
+then
+      APACHE_RUN_USER='www-data'
+fi
+
+if [ -z $APACHE_RUN_GROUP ]
+then
+      APACHE_RUN_GROUP='www-data'
+fi
+
+if [[ $(stat -c '%U' $WEBSITE_ROOT) != $APACHE_RUN_USER ]];
+then
+			chown -R $APACHE_RUN_USER:$APACHE_RUN_GROUP $WEBSITE_ROOT
+fi
+
+# refresh commands
+if [[ $DKR_RUN_REFRESH == "false" ]]; then
+  echo 'Will NOT run refresh commands.'
+else
+  echo 'Running refresh commands...'
+  php $WEBSITE_ROOT/bin/console refresh
+fi
+
+php $WEBSITE_ROOT/bin/console cache:clear
+php $WEBSITE_ROOT/bin/console cache:warm
+
+echo "Go!"
+
+exec apache2-foreground