pin to specific version of poetry

.github/workflows/backend_tests.yml

@@ -193,7 +193,7 @@ jobs:
           python-version: "3.11"
       - name: Install Poetry
         run: |
-          pipx install poetry
+          pipx install --pip-args=--constraint=spiffworkflow-backend/.github/workflows/constraints.txt poetry
           poetry --version
       - name: Poetry Install
         run: poetry install

spiffworkflow-backend/Dockerfile

@@ -19,7 +19,7 @@ RUN apt-get update \
 # Setup image for installing Python dependencies.
 FROM base AS setup
 
-RUN pip install poetry
+RUN pip install poetry=1.2.2
 RUN useradd _gunicorn --no-create-home --user-group
 
 RUN apt-get update \