Update Dockerfile

Dockerfile

@@ -14,7 +14,7 @@ ENV PYTHONUNBUFFERED=1 \
     \
     # poetry
     # https://python-poetry.org/docs/configuration/#using-environment-variables
-    POETRY_VERSION=1.7.1 \
+    POETRY_VERSION=1.8.5 \
     # make poetry install to this location
     POETRY_HOME="/opt/poetry" \
     # make poetry create the virtual environment in the project's root