Add rest-api example (#889)

examples/rest-api/database.py

@@ -0,0 +1,11 @@
+from sqlalchemy import create_engine
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import sessionmaker
+
+SQLALCHEMY_DATABASE_URI = "sqlite:///./app.db"
+
+engine = create_engine(SQLALCHEMY_DATABASE_URI, connect_args={"check_same_thread": False})
+
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+Base = declarative_base()