chore: minor fixes and formatting

alembic/env.py

@@ -1,4 +1,5 @@
 import asyncio
+import os
 from logging.config import fileConfig
 
 from sqlalchemy import pool
@@ -6,14 +7,17 @@ from sqlalchemy.engine import Connection
 from sqlalchemy.ext.asyncio import async_engine_from_config
 
 from alembic import context
-
 from db.base import Base
-from db.models import *  # noqa: F403
+from db.models import *
 
 # this is the Alembic Config object, which provides
 # access to the values within the .ini file in use.
 config = context.config
 
+postgres_url = os.getenv("POSTGRES_URL")
+if postgres_url:
+    config.set_main_option("sqlalchemy.url", postgres_url)
+
 # Interpret the config file for Python logging.
 # This line sets up loggers basically.
 if config.config_file_name is not None: