add postgres

backend/db.py

@@ -0,0 +1,35 @@
+from __future__ import annotations
+
+import os
+
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker
+
+
+def _env(name: str, default: str) -> str:
+    value = os.getenv(name)
+    return value if value else default
+
+
+def build_database_url() -> str:
+    host = _env("POSTGRES_HOST", "10.10.10.167")
+    port = _env("POSTGRES_PORT", "5432")
+    db = _env("POSTGRES_DB", "devops_portal")
+    user = _env("POSTGRES_USER", "devops_portal")
+    password = _env("POSTGRES_PASSWORD", "change-me")
+    return f"postgresql+psycopg://{user}:{password}@{host}:{port}/{db}"
+
+
+DATABASE_URL = _env("DATABASE_URL", build_database_url())
+
+engine = create_engine(DATABASE_URL, pool_pre_ping=True)
+SessionLocal = sessionmaker(bind=engine, autoflush=False, autocommit=False)
+
+
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()
+