Initial commit: StackPilot Phase 1 (Core)

Self-hosted Docker Compose manager.
- Backend: FastAPI + docker-py + SQLite (JWT auth, file-first stacks,
  lifecycle, live status, WebSocket logs, docker-run converter, audit log)
- Frontend: React + Vite + Tailwind (login/setup, dashboard, stacks,
  stack detail, Monaco editor, dark/light theme)
- Deployment: docker-compose.yml, Dockerfiles, nginx reverse proxy

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,25 @@
+# Python
+__pycache__/
+*.pyc
+*.pyo
+.venv/
+venv/
+
+# Node / frontend
+node_modules/
+frontend/dist/
+
+# App data / secrets
+data/
+*.db
+.env
+
+# Compose backups
+**/.compose.yaml.bak
+**/compose.yaml.bak
+
+# Editor / OS
+.DS_Store
+*.swp
+.idea/
+.vscode/