add init new files

app/db/engine.py

@@ -0,0 +1,21 @@
+from urllib.parse import quote_plus
+
+from sqlalchemy import create_engine
+
+from app.core.config import settings
+
+
+def build_db_url() -> str:
+    user = quote_plus(settings.DB_USER)
+    password = quote_plus(settings.DB_PASSWORD)
+    host = settings.DB_HOST
+    port = settings.DB_PORT
+    db = quote_plus(settings.DB_NAME)
+
+    return (
+        f"postgresql+psycopg://{user}:{password}@{host}:{port}/{db}"
+        f"?sslmode={quote_plus(settings.DB_SSLMODE)}"
+    )
+
+
+engine = create_engine(build_db_url(), pool_pre_ping=True)