wk1: initial docker image setup

target/scripts/build/packages.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+DEBUG_PACKAGES=(procps)
+POSTFIX_PACKAGES=(postfix)
+DOVECOT_PACKAGES=(dovecot-core dovecot-imapd dovecot-ldap)
+RSPAMD_PACKAGES=(rspamd redis-server)
+FAIL2BAN_PACKAGES=(fail2ban)
+
+PACKAGES=(
+    tini
+    supervisor
+    ${DEBUG_PACKAGES[@]}
+    ${POSTFIX_PACKAGES[@]}
+    ${DOVECOT_PACKAGES[@]}
+    # ${RSPAMD_PACKAGES[@]}
+    # ${FAIL2BAN_PACKAGES[@]}
+)
+
+apt update
+apt install -y "${PACKAGES[@]}"
+apt clean
+
+# TODO: post-installation goes here

target/scripts/helpers/index.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+SCRIPT_PATH="/usr/local/bin/helpers"
+
+source "${SCRIPT_PATH}/log.sh"

target/scripts/helpers/log.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+LOGFILE=/var/log/mail/mail.log
+mkdir -p $(dirname "$LOGFILE")
+touch "${LOGFILE}"
+
+function log() {
+    /usr/local/bin/log "$1" "$2" > $LOGFILE
+}

target/scripts/start-services.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+set -o pipefail
+
+source /usr/local/bin/helpers/index.sh
+
+start_daemon () {
+    service="$1"
+    log "info" "Starting service $service..."
+    result=$(supervisorctl start "${service}" 2>&1)
+
+    if [[ ${?} -ne 0 ]]; then
+        log "error" "Failed to start $service" 
+        exit 1
+    fi
+}
+
+# start daemons
+log "info" "Starting daemons..."
+start_daemon fail2ban-server
+start_daemon rspamd
+start_daemon rspamd-redis
+start_daemon dovecot
+start_daemon postfix
+
+exec tail "${LOGFILE}"