chore: prepare repo for use with Docker

Dockerfile

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+FROM debian:12-slim
+ADD . /opt/lwb5
+RUN <<EOF
+	set -e
+	export DEBIAN_FRONTEND=noninteractive
+	export DEBCONF_NONINTERACTIVE_SEEN=true
+	apt-get update && apt-get dist-upgrade -uy
+	apt-get -y install lsb-release ca-certificates curl
+	curl -sSLo /tmp/debsuryorg-archive-keyring.deb \
+		https://packages.sury.org/debsuryorg-archive-keyring.deb
+	dpkg -i /tmp/debsuryorg-archive-keyring.deb
+	echo "deb [signed-by=/usr/share/keyrings/deb.sury.org-php.gpg] https://packages.sury.org/php/ $(lsb_release -sc) main" \
+		> /etc/apt/sources.list.d/php.list
+	apt-get update
+	apt-get install -y apache2 libapache2-mod-php8.3 \
+		php8.3-cli php8.3-opcache php8.3-pgsql \
+		php8.3-xml socat
+	a2dismod mpm_event
+	a2enmod mpm_prefork
+	adduser --system --group \
+		--shell '/usr/bin/php /opt/lwb5/scripts/ticks.php' \
+		--comment 'LWB5 Ticks' \
+		--home /opt/lwb5 --no-create-home \
+		lwticks
+	/bin/echo -e "Listen 80\nListen 81" > /etc/apache2/ports.conf
+	cat > /etc/apache2/sites-available/lwb5-main.conf <<EOC
+<VirtualHost *:80>
+	ServerAdmin webmaster@localhost
+	DocumentRoot /opt/lwb5/site
+	ErrorLog /dev/stderr
+	CustomLog /dev/stdout combined
+	<Directory /opt/lwb5/site>
+		Require all granted
+		php_flag log_errors on
+		php_value error_log syslog
+	</Directory>
+	<Files "*.inc">
+		Require all denied
+	</Files>
+</VirtualHost>
+EOC
+	cat > /etc/apache2/sites-available/lwb5-admin.conf <<EOC
+<VirtualHost *:81>
+	ServerAdmin webmaster@localhost
+	DocumentRoot /opt/lwb5/admin
+	ErrorLog /dev/stderr
+	CustomLog /dev/stdout combined
+	<Directory /opt/lwb5/admin>
+		Require all granted
+		php_flag log_errors on
+		php_value error_log syslog
+	</Directory>
+	<Files "*.inc">
+		Require all denied
+	</Files>
+</VirtualHost>
+EOC
+	a2dissite 000-default
+	a2ensite lwb5-main
+	a2ensite lwb5-admin
+EOF
+
+EXPOSE 80 81
+ENTRYPOINT ["/opt/lwb5/run-lwb5.sh"]