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/nginx/resources/conf.d/default.conf

@@ -0,0 +1,35 @@
+server {
+    listen 8080;
+    server_name localhost;
+
+    gzip on;
+    gzip_comp_level 9;
+    gzip_types
+    text/html
+    text/plain
+    text/css
+    text/js
+    text/xml
+    text/javascript
+    application/javascript
+    application/json
+    application/xml
+    application/rss+xml
+    image/svg+xml;
+
+    root /tmp/site;
+
+    location / {
+        index index.html index.htm;
+    }
+
+    location ~* ^/([^/]+) {
+        index index.html index.htm;
+        error_page 404 = @error;
+    }
+
+    error_page 404 /404.html;
+    location @error {
+        try_files /$1/404.html /404.html =404;
+    }
+}