feat: add support for sending email to the docker image

docker/Dockerfile.game

@@ -1,6 +1,8 @@
 FROM debian:12-slim
 RUN <<EOF
 	set -e
+	export PHP_VERSION=8.3
+
 	export DEBIAN_FRONTEND=noninteractive
 	export DEBCONF_NONINTERACTIVE_SEEN=true
 	apt-get update && apt-get dist-upgrade -uy
@@ -13,9 +15,9 @@ RUN <<EOF
 	echo "deb [signed-by=/usr/share/keyrings/deb.sury.org-php.gpg] https://packages.sury.org/php/ $(lsb_release -sc) main" \
 		> /etc/apt/sources.list.d/php.list
 	apt-get update
-	apt-get install -y apache2 libapache2-mod-php8.3 \
-		php8.3-cli php8.3-opcache php8.3-pgsql \
-		php8.3-xml socat
+	apt-get install -y apache2 libapache2-mod-php${PHP_VERSION} msmtp \
+		php${PHP_VERSION}-cli php${PHP_VERSION}-opcache \
+		php${PHP_VERSION}-pgsql php${PHP_VERSION}-xml socat
 
 	adduser --system --ingroup www-data \
 		--shell '/bin/false' \
@@ -23,6 +25,13 @@ RUN <<EOF
 		--home /opt/lwb5 --no-create-home \
 		lwticks
 
+	for what in apache2 cli; do
+		cat >/etc/php/${PHP_VERSION}/${what}/conf.d/99-smtp.ini <<EOC
+[mail function]
+sendmail_path = "/usr/bin/msmtp -t"
+EOC
+	done
+
 	a2dismod mpm_event
 	a2enmod mpm_prefork
 	/bin/echo -e "Listen 80\nListen 81" > /etc/apache2/ports.conf

docker/compose.yml

@@ -44,14 +44,22 @@ services:
       - planets:/opt/lwb5/site/static/beta5/pics/pl:ro
       - pgen:/var/spool/pgen:rw
     environment:
-      LW_DB_HOST: db
       LW_DB_ADMIN_PASS_FILE: /run/secrets/lw_db_admin_pass
+      LW_DB_HOST: db
       LW_DB_USER_PASS_FILE: /run/secrets/lw_db_user_pass
+      LW_MAIL_FROM: ${LW_MAIL_FROM}
       LW_SEND_MAIL: ${LW_SEND_MAIL}
       LW_STATIC_URL: ${LW_STATIC_URL}
+      SMTP_AUTH: ${SMTP_AUTH}
+      SMTP_ENVFROM: ${SMTP_ENVFROM}
+      SMTP_HOST: ${SMTP_HOST}
+      SMTP_PORT: ${SMTP_PORT}
+      SMTP_TLS: ${SMTP_TLS}
+      SMTP_USER: ${SMTP_USER}
     secrets:
       - lw_db_user_pass
       - lw_db_admin_pass
+      - smtp_password
 
   planetgen:
     build:
@@ -81,3 +89,5 @@ secrets:
     environment: LW_ADMIN_PASSWORD
   lw_peacekeepers_password:
     environment: LW_PEACEKEEPERS_PASSWORD
+  smtp_password:
+    environment: SMTP_PASSWORD

docker/env.example

@@ -1,10 +1,25 @@
 # Password for the database superuser
 DB_PASSWORD=...
 
+# SMTP - Outgoing server
+SMTP_HOST=smtp.example.org
+# SMTP - Port number
+SMTP_PORT=587
+# SMTP - Enable TLS? (on/off)
+SMTP_TLS=on
+# SMTP - Authenticate to outgoing server? (on/off)
+SMTP_AUTH=on
+# SMTP - User name
+SMTP_USER=...
+# SMTP - Password
+SMTP_PASSWORD=...
+
 # URL of the static assets from an external perspective
 LW_STATIC_URL=http://localhost/static
 # Send email? (yes or no)
 LW_SEND_MAIL=no
+# Source address for LW mails
+LW_MAIL_FROM=legacyworlds@example.org
 
 # Legacyworlds database - Main user
 LW_DB_USER_PASS=...

game/run-lwb5.sh

@@ -1,5 +1,29 @@
 #!/bin/bash
 
+(
+	cat <<EOF
+defaults
+tls $SMTP_TLS
+tls_trust_file /etc/ssl/certs/ca-certificates.crt
+syslog on
+
+account account
+host $SMTP_HOST
+port $SMTP_PORT
+auth $SMTP_AUTH
+from $LW_MAIL_FROM
+EOF
+	if [ "$SMTP_AUTH" = "on" ]; then
+		echo "user $SMTP_USER"
+		echo 'passwordeval "cat /run/secrets/smtp_password"'
+	fi
+
+	cat <<EOF
+account default : account
+aliases /etc/aliases
+EOF
+) > /etc/msmtprc
+
 socat -u \
 	UNIX-LISTEN:/dev/log,reuseaddr,mode=666,fork \
 	SYSTEM:"(sed -z 's/$/\\\\n/'; /bin/echo)" \