try adding poetry.lock to speed up docker build

.gitignore

@@ -95,7 +95,7 @@ ipython_config.py
 #   This is especially recommended for binary packages to ensure reproducibility, and is more
 #   commonly ignored for libraries.
 #   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
-poetry.lock
+# poetry.lock
 
 # PEP 582; used by e.g. github.com/David-OConnor/pyflow
 __pypackages__/

Dockerfile-demo

@@ -5,6 +5,7 @@ RUN pip install poetry
 WORKDIR /code
 
 COPY pyproject.toml /code/
+COPY poetry.lock /code/
 RUN poetry config virtualenvs.create false && poetry install --no-dev --no-interaction --no-ansi
 
 COPY demo/server/requirements.txt /code/