Import Vector lab project

backend/database.py

@@ -0,0 +1,26 @@
+from sqlalchemy import create_engine
+from sqlalchemy.orm import declarative_base, sessionmaker
+import os
+
+DATABASE_URL = os.getenv(
+    "DATABASE_URL",
+    "postgresql://postgres:postgres@postgres:5432/vector_mchs"
+)
+
+engine = create_engine(DATABASE_URL, echo=False)
+
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+Base = declarative_base()
+
+
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()
+
+
+def init_db():
+    Base.metadata.create_all(bind=engine)