add alembic config, get db url from app settings

Dockerfile

@@ -31,9 +31,13 @@ COPY --from=builder ${VIRTUAL_ENV} ${VIRTUAL_ENV}
 
 WORKDIR /project
 
+# app source files
 COPY sync.py .
 COPY aggregator.py .
-COPY alembic ./alembic
 COPY app ./app
 
+# db migrations files
+COPY alembic ./alembic
+COPY docs/alembic.example.ini ./alembic.ini
+
 CMD uvicorn app:create_app --host 0.0.0.0 --port 8000

alembic/env.py

@@ -8,6 +8,8 @@
 from alembic import context
 
 from app.models import Base
+from app.utils import get_settings
+
 
 # this is the Alembic Config object, which provides
 # access to the values within the .ini file in use.
@@ -28,7 +30,8 @@
 # can be acquired:
 # my_important_option = config.get_main_option("my_important_option")
 # ... etc.
-
+settings = get_settings()
+config.set_main_option('sqlalchemy.url', settings.database.endpoint)
 
 def run_migrations_offline() -> None:
     """Run migrations in 'offline' mode.