Initial commit of docker compose project generator

Creates project directory structure in /docker
Creates docker-compose.yml with sensible defaults
Creates borgmatic config in /etc/borgmatic.d
Adds proxy info to caddyfile and reloads caddy
Config file generation done via jsonnet and yq
Borgmatic configured to backup to borgbase repo

borgmatic/borg-config.jsonnet

@@ -0,0 +1,77 @@
+function(
+    project,
+    encryption_passphrase,
+    parent_dir='/docker',
+    repo_path='ssh://s1dw3340@s1dw3340.repo.borgbase.com/./repo',
+    repo_label='winterfell-docker on BorgBase',
+    exclude_patterns=[
+        // Generic caches & temp
+        '**/tmp/',
+        '**/temp/',
+        '**/.cache/',
+        '**/cache/',
+
+        // Potential ephemeral DB areas (adjust if you do raw file backups)
+        '**/pg_stat_tmp/',
+        '**/pg_replslot/',
+
+        // Node-based ephemeral
+        '**/node_modules/',
+
+        // System or FS-specific
+        '**/lost+found/',
+        '**/*.lock',
+    ],
+    one_file_system=true,
+    compression='auto,zstd',
+    archive_name_format='docker-{now:%Y-%m-%d-%H%M%S}',
+    prefix_project_name_archive=true,
+    retries=0,
+    retry_wait=2,
+    keep_daily=3,
+    keep_weekly=4,
+    keep_monthly=12,
+    checks=[
+        {
+            "name": "repository",
+            "frequency": "4 weeks"
+        },
+        {
+            "name": "archives",
+            "frequency": "8 weeks"
+        }
+    ],
+    check_last=3,
+    before_backup='/code/scripts/docker-gen/borgmatic/pre-backup-docker-compose-down.sh {{project}}',
+    after_backup='/code/scripts/docker-gen/borgmatic/post-backup-docker-compose-up.sh {{project}}'
+)
+    
+{    
+    'source_directories': [
+        std.rstripChars(parent_dir, '/') + '/' + std.stripChars(project, ' ')
+    ],
+    'repositories': [
+        {
+            'path': repo_path,
+            'label': repo_label
+        }
+    ],
+    'exclude_patterns': exclude_patterns,
+    'one_file_system': one_file_system,
+    'compression': compression,
+    'encryption_passphrase': encryption_passphrase,
+    'archive_name_format': if prefix_project_name_archive then project + '-' + archive_name_format else archive_name_format,
+    'retries': retries,
+    'retry_wait': retry_wait,
+    'keep_daily': keep_daily,
+    'keep_weekly': keep_weekly,
+    'keep_monthly': keep_monthly,
+    'checks': checks,
+    'check_last': check_last,
+    'before_backup': [
+        std.strReplace(before_backup, '{{project}}', project)
+    ],
+    'after_backup': [
+        std.strReplace(after_backup, '{{project}}', project)
+    ]
+}