app/db/database.py

import os
from dotenv import load_dotenv
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
from sqlalchemy.ext.declarative import declarative_base

load_dotenv()

SQLALCHEMY_DATABASE_URL = os.getenv("POSTGRES_DATABASE_URL")

engine = create_engine(
    SQLALCHEMY_DATABASE_URL,
    pool_pre_ping=True
)
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

Base = declarative_base()