feat(mail): enhance mail configuration with getmail and dovecot settings

- Added getmail configuration generation using template files.
- Introduced postfix and dovecot configuration checksums for deployment.
- Created new dovecot configuration file and sieve script for email handling.
- Updated main.tf to utilize local variables for configuration management.
- Removed redundant external password hasher from main.tf.

feat(nginx): improve nginx configuration management

- Centralized nginx configuration into a local variable with checksum.
- Created separate config maps for default website configurations.
- Updated deployment to utilize new configuration structure.

feat(sftpgo): add SFTPGo application deployment

- Introduced SFTPGo with Kubernetes resources including namespace, config maps, and secrets.
- Configured SFTPGo with SMTP settings and AWS credentials.
- Implemented health checks and volume mounts for persistent storage.

refactor(seafile): remove Seafile module

- Deleted Seafile module and associated resources as part of cleanup.

terraform/modules/apps/mail/resources/postfix/run.config

@@ -0,0 +1,81 @@
+#!/bin/bash
+if [ -z "$SMTP_HOST" ]; then
+  echo "SMTP_HOST is required"
+  exit 1
+fi
+if [ -z "$SMTP_PORT" ]; then
+  echo "SMTP_PORT is required"
+  exit 1
+fi
+if [ -z "$SMTP_USER" ]; then
+  echo "SMTP_USER is required"
+  exit 1
+fi
+if [ -z "$SMTP_PASSWORD" ]; then
+  echo "SMTP_PASSWORD is required"
+  exit 1
+fi
+if [ -z "$DOVECOT_AUTH_ADDRESS" ]; then
+  echo "DOVECOT_AUTH_ADDRESS is required"
+  exit 1
+fi
+if [ -z "$DOVECOT_AUTH_PORT" ]; then
+  echo "DOVECOT_AUTH_PORT is required"
+  exit 1
+fi
+
+postconf -e "myhostname=$MAILNAME"
+postconf -e "mydomain=$MY_PRIMARY_DOMAIN"
+postconf -e "myorigin=$MY_PRIMARY_DOMAIN"
+postconf -e "smtpd_banner=\$myhostname ESMTP \$mail_name"
+postconf -e "mydestination=$MY_DESTINATION"
+
+# Relay configuration
+postconf -e "relayhost=[$SMTP_HOST]:$SMTP_PORT"
+postconf -e "smtp_sasl_auth_enable=yes"
+postconf -e "smtp_sasl_password_maps=static:$SMTP_USER:$SMTP_PASSWORD"
+postconf -e "smtp_sasl_security_options=noanonymous"
+postconf -e "smtp_tls_security_level=encrypt"
+postconf -e "smtp_use_tls=yes"
+postconf -e "smtp_tls_CAfile=/etc/ssl/certs/ca-certificates.crt"
+
+# SASL configuration
+postconf -e "smtpd_sasl_type=dovecot"
+postconf -e "smtpd_sasl_path=inet:$DOVECOT_AUTH_ADDRESS:$DOVECOT_AUTH_PORT"
+postconf -e "smtpd_sasl_auth_enable=yes"
+postconf -e "smtpd_sasl_security_options=noanonymous"
+postconf -e "smtpd_recipient_restrictions=permit_sasl_authenticated, reject"
+postconf -e "smtpd_relay_restrictions=permit_sasl_authenticated, reject_unauth_destination"
+postconf -e "smtpd_sasl_authenticated_header=yes"
+postconf -e "smtpd_tls_wrappermode=yes"
+
+# TLS configuration
+postconf -e "smtpd_tls_cert_file=/etc/letsencrypt/tls.crt"
+postconf -e "smtpd_tls_key_file=/etc/letsencrypt/tls.key"
+postconf -e "smtpd_tls_security_level=encrypt"
+postconf -e "smtp_tls_wrappermode=yes"
+
+# BCC configuration
+postconf -e "virtual_transport=lmtp:[$DOVECOT_LMTP_ADDRESS]:$DOVECOT_LMTP_PORT"
+
+# Other configuration
+postconf -e "inet_interfaces=all"
+postconf -e "inet_protocols=ipv4"
+postconf -e "queue_directory=/var/spool/postfix"
+postconf -e "compatibility_level=2"
+
+# Debugging
+# postconf -e "debug_peer_list=127.0.0.1"
+# postconf -e "debug_peer_level=3"
+
+echo "
+smtps     inet  n       -       n       -       -       smtpd
+  -o syslog_name=postfix/smtps
+  -o smtpd_tls_wrappermode=yes
+  -o smtpd_sasl_auth_enable=yes
+  -o smtpd_recipient_restrictions=permit_sasl_authenticated,reject
+" | sudo tee -a /etc/postfix/master.cf
+
+/usr/sbin/postfix -c /etc/postfix start
+/usr/sbin/postfix -c /etc/postfix abort
+exec "$POSTFIX_PATH" -c /etc/postfix -s