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/k8sapps/disabled/resources/nextcloud-server-snippet.conf

@@ -0,0 +1,27 @@
+server_tokens off;
+proxy_hide_header X-Powered-By;
+
+rewrite ^/.well-known/webfinger /index.php/.well-known/webfinger last;
+rewrite ^/.well-known/nodeinfo /index.php/.well-known/nodeinfo last;
+
+location = /.well-known/carddav {
+  return 301 $scheme://$host/remote.php/dav;
+}
+
+location = /.well-known/caldav {
+  return 301 $scheme://$host/remote.php/dav;
+}
+
+location = /robots.txt {
+  allow all;
+  log_not_found off;
+  access_log off;
+}
+
+location ~ ^/(?:build|tests|config|lib|3rdparty|templates|data)/ {
+  deny all;
+}
+
+location ~ ^/(?:autotest|occ|issue|indie|db_|console) {
+  deny all;
+}