Add missing curl command

Author: Sergio Moretto

Dockerfile

@@ -2,6 +2,7 @@ FROM pulumi/pulumi-python:2.9.0
 
 ARG PYTHON_POETRY_VERSION=1.0.10
 
+RUN apt-get update -y && apt-get install -y curl
 RUN curl -sSL https://raw.githubusercontent.com/sdispater/poetry/master/get-poetry.py | \
     python - --version=${PYTHON_POETRY_VERSION} --yes