feat: add Authelia SSO authentication service

- Add Authelia service to NET stack for centralized SSO
- Create configuration.yml with PostgreSQL storage
- Create users_database.yml for file-based user management
- Add authelia database to PostgreSQL init script
- Configure Traefik ForwardAuth middleware
- Add environment variables to arty.yml
- Supports TOTP and WebAuthn 2FA
- Email notifications via Mailpit SMTP relay
- Protected services: netdata, mailpit, scrapy, restic, traefik, dev, n8n, asciinema, coolify

core/postgres/init/01-init-databases.sh

@@ -49,6 +49,10 @@ psql -v ON_ERROR_STOP=1 --username "$POSTGRES_USER" --dbname "$POSTGRES_DB" <<-E
     SELECT 'CREATE DATABASE coolify'
     WHERE NOT EXISTS (SELECT FROM pg_database WHERE datname = 'coolify')\\gexec
 
+    -- Authelia SSO authentication database
+    SELECT 'CREATE DATABASE authelia'
+    WHERE NOT EXISTS (SELECT FROM pg_database WHERE datname = 'authelia')\\gexec
+
     -- Grant privileges to all databases
     GRANT ALL PRIVILEGES ON DATABASE directus TO $POSTGRES_USER;
     GRANT ALL PRIVILEGES ON DATABASE umami TO $POSTGRES_USER;
@@ -60,11 +64,12 @@ psql -v ON_ERROR_STOP=1 --username "$POSTGRES_USER" --dbname "$POSTGRES_DB" <<-E
     GRANT ALL PRIVILEGES ON DATABASE asciinema TO $POSTGRES_USER;
     GRANT ALL PRIVILEGES ON DATABASE gitea TO $POSTGRES_USER;
     GRANT ALL PRIVILEGES ON DATABASE coolify TO $POSTGRES_USER;
+    GRANT ALL PRIVILEGES ON DATABASE authelia TO $POSTGRES_USER;
 
     -- Log success
     SELECT 'Compose databases initialized:' AS status;
     SELECT datname FROM pg_database
-    WHERE datname IN ('directus', 'umami', 'n8n', 'linkwarden', 'joplin', 'mattermost', 'tandoor', 'asciinema', 'gitea', 'coolify')
+    WHERE datname IN ('directus', 'umami', 'n8n', 'linkwarden', 'joplin', 'mattermost', 'tandoor', 'asciinema', 'gitea', 'coolify', 'authelia')
     ORDER BY datname;
 EOSQL
 
@@ -83,4 +88,5 @@ echo "  • tandoor      - Recipe manager database"
 echo "  • asciinema    - Terminal recording server database"
 echo "  • gitea        - Self-hosted Git service database"
 echo "  • coolify      - Deployment platform database"
+echo "  • authelia     - SSO authentication database"
 echo ""