Work around pypa/pipenv#4453

Dockerfile

@@ -1,22 +1,20 @@
 # Set up a base build container and use to install pip dependencies
 FROM python:3.10-slim-bullseye as base
 FROM base as builder
-
-RUN pip install --user pipenv
-
-# Tell pipenv to create venv in the current directory
-ENV PIPENV_VENV_IN_PROJECT=1
-ADD Pipfile.lock Pipfile /usr/src/
-WORKDIR /usr/src
-RUN /root/.local/bin/pipenv sync
+RUN pip install pipenv
+RUN mkdir /install
+WORKDIR /install
+COPY Pipfile.lock /install/Pipfile.lock
+RUN pipenv requirements >requirements.txt
+RUN pip install --ignore-installed --prefix=/install --no-warn-script-location -r requirements.txt
 
 # Copy over pip dependencies from base
 FROM base
-RUN mkdir -v /usr/src/.venv
-COPY --from=builder /usr/src/.venv/ /usr/src/.venv/
+COPY --from=builder /install /usr/local
 
-# Set up /usr/src as our runtime directory
-WORKDIR /usr/src/
+# Set up /app as our runtime directory
+RUN mkdir /app
+WORKDIR /app
 
 # Run as non-root user
 RUN useradd -M gunicorn
@@ -27,4 +25,4 @@ COPY ./ .
 
 # Run gunicorn as a production-suitable app server
 EXPOSE 7777
-CMD ./.venv/bin/python -m gunicorn --workers 4 --bind 0.0.0.0:7777 challenge.wsgi --keep-alive 5 --log-level info --access-logfile -
+CMD gunicorn --workers 4 --bind 0.0.0.0:7777 challenge.wsgi --keep-alive 5 --log-level info --access-logfile -