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/config.tf

@@ -51,5 +51,45 @@ locals {
       name = kubernetes_secret.relay_mail_credentials.metadata[0].name
     }
   }
+
+
+  getmail_config = { for job in local.getmail_jobs : "getmailrc_${job.name}" =>
+
+    templatefile("${path.module}/resources/getmail/getmailrc.tpl", {
+      recipient            = job.recipient
+      domain               = job.domain
+      server               = job.server
+      port                 = job.port
+      username             = job.username
+      password             = job.password
+      mailbox              = job.mailbox
+      delete_after         = job.delete_after
+      dovecot_lmtp_address = "dovecot-lmtp.mail.svc.cluster.local"
+      dovecot_lmtp_port    = 31024
+    })
+  }
+
+  postfix_run_config = file("${path.module}/resources/postfix/run.config")
+  postfix_bcc_map    = join("\n", [for account in var.email_accounts : "/([^@]+)@${replace(account.domain, ".", "\\.")}/ $${1}+Sent@${account.domain}"])
+
+  postfix_run_config_checksum = sha256(local.postfix_run_config)
+  postfix_bcc_map_checksum    = sha256(local.postfix_bcc_map)
+
+  dovecot_config = file("${path.module}/resources/dovecot/dovecot.conf")
+  dovecot_users  = join("\n", [for account in var.email_accounts : "${account.username}:{BLF-CRYPT.HEX}${local.password_hashes[account.username]}:1000:1000::/var/mail/${account.username}::"])
+  dovecot_sieve  = file("${path.module}/resources/dovecot/sieve")
+
+  dovecot_config_checksum = sha256(local.dovecot_config)
+  dovecot_users_checksum  = sha256(local.dovecot_users)
+  dovecot_sieve_checksum  = sha256(local.dovecot_sieve)
 }
 
+data "external" "password_hasher" {
+  for_each = { for account in var.email_accounts : account.username => account }
+  program  = ["python3", "${path.module}/lib/bcrypt_hash.py"]
+
+  query = {
+    password = each.value.password
+    cost     = "10"
+  }
+}