chore: removes some extra comments in the Containerfile and moves poe…

…try envs

Some of the comments are explained by the code so removes to make this more
readable. The poetry environment variables should not be in the base because
poetry is not installed in the final image.

Signed-off-by: Jennifer Power <barnabei.jennifer@gmail.com>

Dockerfile

@@ -3,35 +3,18 @@
 FROM registry.access.redhat.com/ubi8/ubi-minimal:latest as python-base
 
 ENV PYTHONUNBUFFERED=1 \
-    # prevents python creating .pyc files
     PYTHONDONTWRITEBYTECODE=1 \
-    \
-    # pip
     PIP_DISABLE_PIP_VERSION_CHECK=on \
     PIP_DEFAULT_TIMEOUT=100 \
-    \
-    # poetry
-    # https://python-poetry.org/docs/configuration/#using-environment-variables
-    POETRY_VERSION=1.5.1 \
-    # make poetry install to this location
-    POETRY_HOME="/opt/poetry" \
-    # make poetry create the virtual environment in the project's root
-    # it gets named `.venv`
-    POETRY_VIRTUALENVS_IN_PROJECT=true \
-    # do not ask any interactive question
-    POETRY_NO_INTERACTION=1 \
-    \
-    # paths
-    # this is where our requirements + virtual environment will live
+    # Paths for the virtual environment and working directory
     PYSETUP_PATH="/trestle-bot" \
     VENV_PATH="/trestle-bot/.venv"
 
 LABEL maintainer="Red Hat Product Security" \
       summary="Trestle Bot"
 
-
-# prepend poetry and venv to path
-ENV PATH="$POETRY_HOME/bin:$VENV_PATH/bin:$PATH"
+# Ensure we use the virtualenv
+ENV PATH="$VENV_PATH/bin:$PATH"
 
 RUN microdnf update -y \
     && microdnf install -y python3.9 git \
@@ -40,28 +23,36 @@ RUN microdnf update -y \
 
 FROM python-base as dependencies
 
-# install poetry - respects $POETRY_VERSION & $POETRY_HOME
+ARG POETRY_VERSION=1.5.1
+
+# https://python-poetry.org/docs/configuration/#using-environment-variables
+ENV POETRY_HOME="/opt/poetry" \
+    POETRY_VIRTUALENVS_IN_PROJECT=true \
+    POETRY_NO_INTERACTION=1
+
+ENV PATH="$POETRY_HOME/bin:$PATH"
+
+# install poetry - respects $POETRY_HOME
 RUN  python3.9 -m pip install --no-cache-dir --upgrade pip \
     && pip install --no-cache-dir poetry=="$POETRY_VERSION"
 
-# Cache runtime deps
 WORKDIR "/build"
 COPY . "/build"
 
 # Install runtime deps and install the project in non-editable mode.
-RUN python -m venv $VENV_PATH && \
+RUN python3.9 -m venv $VENV_PATH && \
   . $VENV_PATH/bin/activate && \
   poetry install --without tests,dev --no-root && \
   poetry build -f wheel -n && \
   pip install --no-cache-dir --no-deps dist/*.whl && \
   rm -rf dist *.egg-info
 
-# final image
+
 FROM python-base as final
 
 COPY --from=dependencies $PYSETUP_PATH $PYSETUP_PATH
 
-# Add wrappers for entrypoints that provide support the actions
+# Add wrappers for entrypoints that provide support for the actions
 COPY ./actions/autosync/auto-sync-entrypoint.sh /
 COPY ./actions/rules-transform/rules-transform-entrypoint.sh /
 COPY ./actions/create-cd/create-cd-entrypoint.sh /