Make sure to install poetry in production image as well

Dockerfile

@@ -67,10 +67,10 @@ WORKDIR $PYSETUP_PATH
 COPY poetry.lock pyproject.toml ./
 
 # install runtime deps - uses $POETRY_VIRTUALENVS_IN_PROJECT internally
-#  --> also download required ColBERT model files
 RUN --mount=type=cache,target=/root/.cache \
     poetry install --no-root 
 
+#  --> also download required ColBERT model files
 COPY ./docs_qa/preload_colbert.py ./app/docs_qa/preload_colbert.py
 RUN poetry run python ./app/docs_qa/preload_colbert.py
 
@@ -90,6 +90,10 @@ WORKDIR $PYSETUP_PATH
 COPY --from=builder-base $POETRY_HOME $POETRY_HOME
 COPY --from=builder-base $PYSETUP_PATH $PYSETUP_PATH
 
+# install runtime deps - uses $POETRY_VIRTUALENVS_IN_PROJECT internally
+RUN --mount=type=cache,target=/root/.cache \
+    poetry install --no-root 
+
 # copy in our app files
 COPY --from=builder-base /app/ /app/
 WORKDIR /app/