Docs-as-code: full deploy configs, compose stacks, and DR guide

- Add root README and docs/ (architecture, hosts, disaster-recovery, operations)
- Add compose/ for superset, forgejo, lam, cadvisor; unified deploy compose
- Add scripts/deploy (deploy-atc-docker01.sh, container inventory export)
- Add inventory/containers-atc-docker01.json snapshot
- Add config READMEs for kafka and airflow; .env.example; expand .gitignore
- Sync atclab helper scripts; update homepage/superset compose with env support

compose/superset/superset_config.py

@@ -0,0 +1,39 @@
+import os
+
+# Secret key for session signing
+SECRET_KEY = os.environ.get('SUPERSET_SECRET_KEY', 'your-secret-key-here')
+
+# Database configuration - use SQLite to avoid psycopg2 issues
+SQLALCHEMY_DATABASE_URI = 'sqlite:////app/superset_home/superset.db'
+
+# Redis cache configuration
+CACHE_CONFIG = {
+    'CACHE_TYPE': 'redis',
+    'CACHE_REDIS_URL': 'redis://redis:6379/0',
+    'CACHE_DEFAULT_TIMEOUT': 300
+}
+
+# Enable CSRF protection
+ENABLE_PROXY_FIX = True
+
+# Feature flags
+FEATURE_FLAGS = {
+    'ENABLE_TEMPLATE_PROCESSING': True,
+    'ALERT_REPORTS': True,
+}
+
+# Row limit
+ROW_LIMIT = 50000
+
+# Viz types
+VIZ_TYPE_DICT = {
+    'table': {},
+    'dist_bar': {},
+    'line': {},
+    'area': {},
+    'pie': {},
+    'number': {},
+}
+
+# Timezone
+TIMEZONE = 'Europe/Amsterdam'