Improve Dockerfile

Use VIRTUAL_ENV into Dockerfile instead of user system path
Improve local image size optimization

Author: trottomv

{{cookiecutter.project_dirname}}/Dockerfile

@@ -3,31 +3,39 @@ FROM python:3.12-slim-bookworm AS base
 LABEL company="20tab" project="{{ cookiecutter.project_slug }}" service="backend" stage="base"
 ARG DEBIAN_FRONTEND=noninteractive
 ARG USER=appuser
-ENV APPUSER=$USER LANG=C.UTF-8 LC_ALL=C.UTF-8 PYTHONUNBUFFERED=1 PYTHONDONTWRITEBYTECODE=1 WORKDIR=/app
+ENV APPUSER=$USER \
+    LANG=C.UTF-8 \
+    LC_ALL=C.UTF-8 \
+    PYTHONUNBUFFERED=1 \
+    PYTHONDONTWRITEBYTECODE=1 \
+    VIRTUAL_ENV=/opt/venv \
+    WORKDIR=/app
 WORKDIR $WORKDIR
 RUN useradd --skel /dev/null --create-home $APPUSER
 RUN chown $APPUSER:$APPUSER $WORKDIR
-ENV PATH="/home/${APPUSER}/.local/bin:${PATH}"
-ARG PACKAGES_PATH=/home/${APPUSER}/.local/lib/python3.12/site-packages
+ENV PATH="${VIRTUAL_ENV}/bin:${PATH}"
+ARG PACKAGES_PATH=${VIRTUAL_ENV}/lib/python3.12/site-packages
 RUN apt-get update \
     && apt-get install --assume-yes --no-install-recommends \
         libpq5 \
     && rm -rf /var/lib/apt/lists/*
 COPY --chown=$APPUSER ./requirements/base.txt requirements/base.txt
+RUN python3 -m venv $VIRTUAL_ENV \
+    && chown -R $APPUSER:$APPUSER $VIRTUAL_ENV
 RUN apt-get update \
     && apt-get install --assume-yes --no-install-recommends \
         gcc \
         libc6-dev \
         libpq-dev \
-    && su $APPUSER -c "python3 -m pip install --user --no-cache-dir -r requirements/base.txt" \
+    && su $APPUSER -c "python3 -m pip install --no-cache-dir -r requirements/base.txt" \
     && find ${PACKAGES_PATH} -regex '^.*/locale/.*/*.\(mo\|po\)$' -not -path '*/en*' -not -path '*/it*' -delete || true \
     && apt-get purge --assume-yes --auto-remove \
         gcc \
         libc6-dev \
         libpq-dev \
     && rm -rf /var/lib/apt/lists/*
 COPY --chown=$APPUSER ./requirements/common.txt requirements/common.txt
-RUN su $APPUSER -c "python3 -m pip install --user --no-cache-dir -r requirements/common.txt" \
+RUN su $APPUSER -c "python3 -m pip install --no-cache-dir -r requirements/common.txt" \
     && find ${PACKAGES_PATH} -regex '^.*/locale/.*/*.\(mo\|po\)$' -not -path '*/en*' -not -path '*/it*' -delete || true
 
 FROM base AS test
@@ -36,7 +44,7 @@ LABEL company="20tab" project="{{ cookiecutter.project_slug }}" service="backend
 ENV DJANGO_CONFIGURATION=Testing
 USER $APPUSER
 COPY --chown=$APPUSER ./requirements/test.txt requirements/test.txt
-RUN python3 -m pip install --user --no-cache-dir -r requirements/test.txt
+RUN python3 -m pip install --no-cache-dir -r requirements/test.txt
 COPY --chown=$APPUSER . .
 CMD ./scripts/test.sh
 
@@ -45,9 +53,9 @@ FROM base AS remote
 LABEL company="20tab" project="{{ cookiecutter.project_slug }}" service="backend" stage="remote"
 ENV DJANGO_CONFIGURATION=Remote INTERNAL_SERVICE_PORT={{ cookiecutter.internal_service_port }}
 USER $APPUSER
-ARG PACKAGES_PATH=/home/${APPUSER}/.local/lib/python3.12/site-packages
+ARG PACKAGES_PATH=${VIRTUAL_ENV}/lib/python3.12/site-packages
 COPY --chown=$APPUSER ./requirements/remote.txt requirements/remote.txt
-RUN python3 -m pip install --user --no-cache-dir -r requirements/remote.txt \
+RUN python3 -m pip install --no-cache-dir -r requirements/remote.txt \
     && find ${PACKAGES_PATH}/boto*/data/* -maxdepth 0 -type d -not -name s3* -exec rm -rf {} \; || true
 COPY --chown=$APPUSER . .
 RUN DJANGO_SECRET_KEY=build python3 -m manage collectstatic --clear --link --noinput
@@ -71,7 +79,8 @@ RUN apt-get update \
         postgresql-client
 USER $APPUSER
 COPY --chown=$APPUSER ./requirements/local.txt requirements/local.txt
-RUN python3 -m pip install --user --no-cache-dir -r requirements/local.txt
+RUN python3 -m pip install --no-cache-dir -r requirements/local.txt \
+    && find ${PACKAGES_PATH} -regex '^.*/locale/.*/*.\(mo\|po\)$' -not -path '*/en*' -not -path '*/it*' -delete || true
 COPY --chown=$APPUSER . .
 RUN DJANGO_SECRET_KEY=build python3 -m manage collectstatic --clear --link --noinput
 ENTRYPOINT ["./scripts/entrypoint.sh"]