refactor to allow for multiple code locations

Dockerfile.code

@@ -3,7 +3,8 @@ FROM python:3.12-slim
 # Checkout and install dagster libraries needed to run the gRPC server
 # exposing your repository to dagit and dagster-daemon, and to load the DagsterInstance
 
-COPY dagster-requirements.txt requirements.txt
+COPY requirements.txt .
+
 RUN pip install uv
 RUN uv pip install -r requirements.txt --system
 RUN uv pip install polars-lts-cpu --system
@@ -16,5 +17,4 @@ EXPOSE 4000
 
 # CMD allows this to be overridden from run launchers or executors that want
 # to run other commands against your repository
-#CMD ["dagster", "api", "grpc", "-h", "0.0.0.0", "-p", "4000", "-f", "repo.py"]
-CMD ["dagster", "code-server", "start", "-h", "0.0.0.0", "-p", "4000", "-f", "repo.py"]
+CMD ["dagster", "code-server", "start", "-h", "0.0.0.0", "-p", "4000", "-m", "app.definitions"]