add no root and remove poetry once done with it/

Dockerfile

@@ -18,10 +18,12 @@ RUN python -m pip install --no-cache-dir poetry
 
 COPY poetry.lock pyproject.toml /app/
 RUN python -m poetry config virtualenvs.in-project true && \
-     python -m poetry install --only main,deploy && \
+     python -m poetry install --no-root --only main,deploy && \
     /app/.venv/bin/python3 -m pip install --no-cache-dir psycopg2
 USER root
-RUN apt-get purge -y build-essential python3-dev libpq-dev libffi-dev libssl-dev && \
+
+RUN python -m pip uninstall poetry && \
+    apt-get purge -y build-essential python3-dev libpq-dev libffi-dev libssl-dev && \
     rm -rf /var/lib/apt/lists/*
 RUN rm -rf /var/cache/*
 USER app