Refactor Alembic configuration and update Docker setup

- Removed the `alembic.ini` file and migrated its configuration to `pyproject.toml` under `[tool.alembic]`, enhancing project organization.
- Updated the `Dockerfile` to copy `pyproject.toml` instead of `alembic.ini`, ensuring the new configuration is utilized during the build process.
- Modified `entrypoint.sh` to use the new Alembic configuration from `pyproject.toml` for database migrations.
- Updated README documentation to reflect the new Alembic configuration and usage instructions.

alembic/env.py

@@ -1,8 +1,8 @@
 """Alembic env: use duty_teller config DATABASE_URL and db.models.Base."""
 
+import logging
 import os
 import sys
-from logging.config import fileConfig
 
 from sqlalchemy import create_engine
 from alembic import context
@@ -12,9 +12,15 @@ sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 import duty_teller.config as config
 from duty_teller.db.models import Base
 
+# Logging when config is in pyproject.toml (no fileConfig)
+logging.basicConfig(
+    format="%(levelname)-5.5s [%(name)s] %(message)s",
+    datefmt="%H:%M:%S",
+    level=logging.INFO,
+)
+logging.getLogger("sqlalchemy.engine").setLevel(logging.WARN)
+
 config_alembic = context.config
-if config_alembic.config_file_name is not None:
-    fileConfig(config_alembic.config_file_name)
 
 database_url = config.DATABASE_URL
 config_alembic.set_main_option("sqlalchemy.url", database_url)