Initial MinerOps working checkpoint

backend/app/database.py

@@ -0,0 +1,35 @@
+from sqlalchemy import create_engine
+from sqlalchemy.orm import DeclarativeBase, sessionmaker
+
+from app.config import settings
+
+
+def build_database_url() -> str:
+    return (
+        f"postgresql+psycopg://{settings.postgres_user}:"
+        f"{settings.postgres_password}@{settings.postgres_host}:"
+        f"{settings.postgres_port}/{settings.postgres_db}"
+    )
+
+
+DATABASE_URL = build_database_url()
+
+engine = create_engine(DATABASE_URL, pool_pre_ping=True)
+
+SessionLocal = sessionmaker(
+    autocommit=False,
+    autoflush=False,
+    bind=engine,
+)
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()