Initial WireGuard admin panel: FastAPI UI, peer key management, live monitoring, Docker deploy

Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>

app/db.py

@@ -0,0 +1,23 @@
+from sqlalchemy import create_engine
+from sqlalchemy.orm import DeclarativeBase, Session, sessionmaker
+
+from .config import settings
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+engine = create_engine(
+    f"sqlite:///{settings.data_dir / 'wireguard.db'}",
+    connect_args={"check_same_thread": False},
+)
+SessionLocal = sessionmaker(bind=engine, autoflush=False, expire_on_commit=False)
+
+
+def get_db():
+    db: Session = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()