✨ feat(fleetledger): add initial implementation of FleetLedger app

- introduce Dockerfile for Python environment setup
- create FastAPI app with authentication and user management
- implement server management features with CRUD operations
- add PWA support with service worker and manifest
- set up initial templates for UI components

📝 docs(fleetledger): add README for FleetLedger application

- describe app features and functionalities
- provide security notes and quick start guide

📦 build(fleetledger): configure Docker and docker-compose setup

- define Dockerfile for application container
- create docker-compose.yml for service orchestration
- specify environment variables and volumes for persistence

fleetledger/app/db.py

@@ -0,0 +1,21 @@
+from sqlmodel import SQLModel, create_engine, Session
+import os
+
+# SQLite database path, mapped to a Docker volume for persistence
+DB_PATH = os.getenv("DATABASE_PATH", "/data/fleetledger.db")
+
+engine = create_engine(
+    f"sqlite:///{DB_PATH}",
+    connect_args={"check_same_thread": False},
+)
+
+
+def init_db() -> None:
+    """Create all tables if they do not exist yet."""
+    SQLModel.metadata.create_all(engine)
+
+
+def get_session():
+    """FastAPI dependency that yields a SQLModel session."""
+    with Session(engine) as session:
+        yield session